Editing Interstate 39

{{Short description|Interstate Highway in Illinois and Wisconsin}}
{{Redirect|I-39|the Imperial Japanese Navy submarine|Japanese submarine I-39}}
{{Use American English|date=April 2025}}
{{Use mdy dates|date=November 2015}}
{{Infobox road
|country = USA
|type = I
|route = 39
|map = {{maplink-road|from=Interstate 39.map}}
|map_custom = yes
|map_notes = I-39 highlighted in red
|length_mi = 306.14
|length_ref = <ref name="fhwa">{{Cite web |last=Starks |first=Edward |date=January 27, 2022 |title=Table 1: Main Routes of the Dwight D. Eisenhower National System of Interstate and Defense Highways |url=https://www.fhwa.dot.gov/planning/national_highway_system/interstate_highway_system/routefinder/table01.cfm |access-date=December 6, 2023 |work=FHWA Route Log and Finder List |publisher=[[Federal Highway Administration]]}}</ref>
|maint = [[Illinois Department of Transportation|IDOT]], [[Illinois State Toll Highway Authority|ISTHA]] and [[Wisconsin Department of Transportation|WisDOT]]
|established = 1986
|direction_a = South
|terminus_a = {{Jct|state=IL|I|55|US|51}} in [[Normal, Illinois|Normal, IL]]
|junction = <!-- Major junctions only; Only 5-8 most major intersections and cities belong here; please read [[WP:USRD/STDS]] for more info -->
*{{Jct|state=IL|I|80}} in [[LaSalle, Illinois|LaSalle, IL]]
*{{Jct|state=IL|I-Toll|88|CKC}} in [[Rochelle, Illinois|Rochelle, IL]]
*{{Jct|state=IL|I-Toll|90}} in [[Cherry Valley, Illinois|Cherry Valley, IL]]
*{{Jct|state=WI|I|43|WI|81}} in [[Beloit, Wisconsin|Beloit, WI]]
*{{Jct|state=WI|I|94|WI|30}} in [[Madison, Wisconsin|Madison, WI]]
*{{Jct|state=WI|I|90|I|94|WI|78}} in [[Portage, Wisconsin|Portage, WI]]
|direction_b = North
|terminus_b = {{Jct|state=WI|US|51|WI|29}} near [[Rothschild, Wisconsin|Rothschild, WI]]
|states = [[Illinois]], [[Wisconsin]]
|counties = '''IL''': [[McLean County, Illinois|McLean]], [[Woodford County, Illinois|Woodford]], [[Marshall County, Illinois|Marshall]], [[LaSalle County, Illinois|LaSalle]], [[Lee County, Illinois|Lee]], [[Ogle County, Illinois|Ogle]], [[Winnebago County, Illinois|Winnebago]]<br />'''WI''': [[Rock County, Wisconsin|Rock]], [[Dane County, Wisconsin|Dane]], [[Columbia County, Wisconsin|Columbia]], [[Marquette County, Wisconsin|Marquette]], [[Waushara County, Wisconsin|Waushara]], [[Portage County, Wisconsin|Portage]], [[Marathon County, Wisconsin|Marathon]]
|system1={{infobox road/browselinks/USA|state=IL}}
|system2={{infobox road/browselinks/USA|state=WI}}
|browse={{il browse|previous_type=IL|previous_route=38|route=IL|next_type=US|next_route=40}}{{wi browse|previous_type=WI|previous_route=38|route=WI|next_type=WI|next_route=39}}
}}

'''Interstate&nbsp;39''' ('''I-39''') is a north–south [[Interstate Highway System|Interstate Highway]] in Illinois and Wisconsin that runs from an interchange at I-55 in [[Normal, Illinois]], to [[Wisconsin Highway 29|State Trunk Highway&nbsp;29]] (WIS&nbsp;29) approximately {{convert|6|mi|km|spell=in}} south of [[Wausau, Wisconsin]].<ref name="Google2">{{google maps|url=http://www.google.com/maps?f=d&hl=en&geocode=189581027214663335,40.543091,-89.002832%3B6774789599481304502,44.888289,-89.639920&saddr=I-39+N+%4040.543091,+-89.002832&daddr=44.888776,-89.63994&mra=dme&mrcr=0&mrsp=1&sz=15&sll=44.892576,-89.638009&sspn=0.013742,0.028839&ie=UTF8&ll=43.34116,-89.165039&spn=7.222549,14.765625&z=6|title=Overview Map of I-39|access-date=February 15, 2008}}</ref><ref>{{Cite web |date=2012-10-11 |title=Illinois Highway Ends - I-39 |url=http://highwayexplorer.com/il_EndsPage.php?id=3039&section=1 |access-date=2025-01-13 |archive-url=https://web.archive.org/web/20121011012812/http://highwayexplorer.com/il_EndsPage.php?id=3039&section=1 |archive-date=October 11, 2012 }}</ref> In total, Interstate 39 is {{convert|306.14|mi|km}} long.<ref name="fhwa">{{Cite web |last=Starks |first=Edward |date=January 27, 2022 |title=Table 1: Main Routes of the Dwight D. Eisenhower National System of Interstate and Defense Highways |url=https://www.fhwa.dot.gov/planning/national_highway_system/interstate_highway_system/routefinder/table01.cfm |access-date=December 6, 2023 |work=FHWA Route Log and Finder List |publisher=[[Federal Highway Administration]]}}</ref> In Illinois, the route has a total length of {{convert|140.82|mi|km}};<ref name="t22">{{cite web |author=Illinois Technology Transfer Center |year=2006 |title=T2 GIS Data |url=http://www.dot.state.il.us/gist2/select.html |access-date=November 8, 2007 |publisher=[[Illinois Department of Transportation]]}}</ref> in Wisconsin, I-39 has a length of {{convert|182|mi|km}}.

Among the newest Interstate Highways in Illinois, I-39 was completed in 1992. Designed to replace [[U.S. Route 51]] (US&nbsp;51) with an [[Interstate Highway standards|Interstate-grade freeway]], the highway [[concurrency (road)|runs concurrently]] with [[U.S. Route 20 in Illinois|US&nbsp;20]] in [[Rockford, Illinois|Rockford]] before joining I-90. From Rockford to [[Portage, Wisconsin]], I-39 and I-90 run concurrently. From [[Madison, Wisconsin|Madison]] to Portage, I-94 joins the two; at {{convert|29|mi|km}}, the three-way concurrency is the longest in the country. From Portage northward, US 51 rejoins I-39, and the Interstate uses its mileposts northward.

== Route description ==
=== Illinois ===
[[File:Minonk,_Illinois_aerial_01A.jpg|left|thumb|Aerial view of I-39 as it passes [[Minonk, Illinois]], April&nbsp;2012]]
In Illinois, I-39 begins at [[Interstate 55 in Illinois|I-55]] north of [[Bloomington–Normal, Illinois]], less than one mile east from the intersection of I-74 and I-55 that runs around the city of Normal. US&nbsp;51 splits from I-55, joining I-39; exit&nbsp;2 marks the northern terminus of the [[U.S. Route 51 Business (Bloomington–Normal, Illinois)|US&nbsp;51 business route]]. From Normal northward, I-39 runs northward largely through rural areas. At exit&nbsp;8, the route forms the southern terminus of [[Illinois Route&nbsp;251]] (IL&nbsp;251), which was derived from the original routing of US&nbsp;51.

In [[Oglesby, Illinois|Oglesby]] in central [[LaSalle County, Illinois|LaSalle County]], I-39 passes next to [[Starved Rock State Park]], the busiest state park in Illinois. North of the park, it crosses the [[Illinois River]] over the [[Abraham Lincoln Memorial Bridge]]; at {{convert|1.3|mi|km}} long, it is the longest bridge in the state.<ref name="national_bridges2">{{cite web |author=Federal Highway Administration |title=Structure 000050019120847 |url=http://nationalbridges.com/index.php?option=com_lqm&b1849fc92c286e5b5ed0fbf618d953ae=1&task=showResults&query=8&lqm_id=169862&&format=raw&&Itemid=2 |url-status=dead |archive-url=https://web.archive.org/web/20140101034538/http://nationalbridges.com/index.php?option=com_lqm&b1849fc92c286e5b5ed0fbf618d953ae=1&task=showResults&query=8&lqm_id=169862&&format=raw&&Itemid=2 |archive-date=January 1, 2014 |access-date=June 1, 2012 |work=[[National Bridge Inventory]] |publisher=Federal Highway Administration}}</ref> Just north of the river, I-39 passes between the cities of [[LaSalle, Illinois|LaSalle]] and [[Peru, Illinois|Peru]]; as it intersects [[Interstate 80 in Illinois|I-80]] and [[U.S. Route 6 in Illinois|US&nbsp;6]], it makes its southernmost connections with the Chicago region. North of I-80, the wind turbines of the [[Mendota Hills Wind Farm]] (the first commercial wind farm in Illinois) can be seen from milepost&nbsp;72 at [[Mendota, Illinois|Mendota]] north to near [[Paw Paw, Illinois|Paw Paw]]. As I-39 continues northward, I-39 also intersects [[U.S. Route 52 in Illinois|US&nbsp;52]] and [[U.S. Route 30 in Illinois|US&nbsp;30]].

In [[Ogle County, Illinois|Ogle County]], I-39 intersects with [[Interstate 88 (Illinois)|I-88]] ([[Chicago–Kansas City Expressway|IL&nbsp;110]]), connecting I-39 to both Chicago and the Quad Cities regions. As it intersects [[Illinois Route 38|IL&nbsp;38]], [[Illinois Route 64|IL&nbsp;64]], and [[Illinois Route 72|IL&nbsp;72]], I-39 connects with the DeKalb–Sycamore region and far west suburbs of the Chicago area.

As I-39 crosses into Winnebago County, the Baxter Road exit (exit&nbsp;115) is the final exit before I-39 joins the [[U.S. Route 20 in Illinois|US&nbsp;20]] freeway bypass in Rockford. Approximately a mile east of the Alpine Road/US&nbsp;20 interchange, I-39 joins US&nbsp;20, moving from nearly entirely farmland to medium-density populated areas.

After heading northeast for approximately {{convert|4|mi|km|spell=in}}, US&nbsp;20 splits from I-39/US&nbsp;51; a mile northward, I-39/US&nbsp;51 runs concurrently with I-90 ([[Interstate 90 in Illinois#Jane Addams Memorial Tollway|Jane Addams Memorial Tollway]]). Though signed as I-39/I-90, the concurrency follows the mileposts of I-90. Though I-39 itself is not tolled, the [[Illinois Tollway]] collects tolls on the I-90 portion, including two ramp interchanges and an open-road toll plaza between Rockton and South Beloit.

At exit&nbsp;1 ([[Illinois Route 75|IL&nbsp;75]]) in [[South Beloit, Illinois|South Beloit]], US&nbsp;51 splits from I-39 to join IL&nbsp;75; {{convert|2|mi|km|spell=in}} westward, it continues the route of IL&nbsp;251 into Wisconsin. For all but one mile that I-39 is in Illinois, it runs concurrently with US&nbsp;51.{{clear left}}

=== Wisconsin ===
[[File:Interstate39NorthernWisconsinForest.jpg|left|thumb|I-39/US&nbsp;51 in northern Wisconsin]]
[[File:I39_northern_terminus.jpg|thumb|Northern terminus of I-39 at the interchange with WIS 29 near Wausau]]
I-39 enters Wisconsin in Rock County, concurrently with I-90. Bypassing Beloit to the east, it passes underneath the County Trunk Highway&nbsp;P bridge (CTH-P, Stateline Road). The tri-stack exit&nbsp;185 provides access to Beloit through [[Wisconsin Highway 81|WIS&nbsp;81]] and serves as the southern terminus of [[Interstate 43|I-43]] (accessing Milwaukee and Green Bay).<ref name="wisdot132">{{cite WisDOT map|year=2013}}</ref> The northernmost interchange serving the Beloit region is CTH-S (Shopiere Road) at exit&nbsp;183. About {{convert|7|mi|km|spell=in}} north of the I-43 interchange, I-39/I-90 is joined by [[Wisconsin Highway 11|WIS&nbsp;11]] for {{convert|2|mi|km|spell=in}} as it bypasses [[Janesville, Wisconsin|Janesville]]. In addition to the northern interchange that holds WIS&nbsp;11, Janesville is also accessed by [[U.S. Route 14 in Wisconsin|US&nbsp;14]] and [[Wisconsin Highway 26|WIS&nbsp;26]] (Milton Avenue). After crossing the [[Rock River (Mississippi River tributary)|Rock River]], I-39/I-90 has an interchange with [[Wisconsin Highway 59|WIS&nbsp;59]], connecting it with [[Edgerton, Wisconsin|Edgerton]] (to the west) and [[Milton, Wisconsin|Milton]] (to the southeast).<ref name="wisdot132" />

I-39 enters [[Dane County, Wisconsin|Dane County]] north of WIS&nbsp;59, passing west of [[Lake Koshkonong]]. For approximately {{convert|4|mi|km|spell=in}}, US&nbsp;51 rejoins the Interstate (from mile&nbsp;160 to 156) before it heads west through [[Stoughton, Wisconsin|Stoughton]]. I-39/I-90 changes direction north of [[Utica, Dane County, Wisconsin|Utica]], gradually turning northwest. At exit&nbsp;142, the highway turns returns north as it meets [[U.S. Route 12 in Wisconsin|US&nbsp;12]]/[[U.S. Route 18 in Wisconsin|US&nbsp;18]] in Madison, forming the eastern terminus of the Madison Beltline Highway; for approximately {{convert|650|ft|m}}, northbound I-39 is reduced to two lanes (for the first time since Cherry Valley, Illinois). North of the Beltline, I-39 accesses Madison through an interchange with [[Wisconsin Highway 30|WIS&nbsp;30]] and [[Interstate 94 in Wisconsin|I-94]] (routed from Milwaukee); the interchange is known as the Badger Interchange.<ref name="wisdot_badger_int2">{{cite press release |title=I-94 reconstruction to be discussed September 19 |publisher=Wisconsin Department of Transportation |url=http://www.dot.wisconsin.gov/opencms/export/nr/modules/news/news_0396.html_786229440.html |last=Buschkopf |first=Jim |access-date=January 12, 2007 |archive-url=https://web.archive.org/web/20080827230235/http://www.dot.wisconsin.gov/opencms/export/nr/modules/news/news_0396.html_786229440.html |archive-date=August 27, 2008}}</ref> {{convert|2|mi|km|spell=In}} further north, the highway has an interchange with [[U.S. Route 151|US&nbsp;151]] (splitting Madison and [[Sun Prairie, Wisconsin|Sun Prairie]]); the northernmost Madison-area I-39 interchanges are US&nbsp;51 (Madison and [[DeForest, Wisconsin|DeForest]]) and WIS&nbsp;19 (Sun Prairie and [[Waunakee, Wisconsin|Waunakee]]); CTH-V (West North Street) for DeForest serves as the last Dane County exit.

I-39/I-90/I-94 enters [[Columbia County, Wisconsin|Columbia County]] {{convert|4|mi|km|spell=in}} north-northwest of CTH-V.<ref name="wisdot132" /> From the county line northward, the highway returns to rural surroundings. {{Convert|3|mi|km|spell=In}} after crossing the [[Wisconsin River]], exit&nbsp;108 ([[Wisconsin Dells, Wisconsin|Wisconsin Dells]]) splits I-90/I-94 from I-39. For the first time since the US&nbsp;20 Bypass in Rockford–Cherry Valley, I-39 is four lanes instead of six or eight. I-39 continues northward from [[Wisconsin Highway 78|WIS&nbsp;78]] (which terminates at the interchange), routed towards Portage. I-39 connects with Portage through [[Wisconsin Highway 33|WIS&nbsp;33]], crosses the Wisconsin River a second time, connects with [[Wisconsin Highway 16|WIS&nbsp;16]]; a third interchange rejoins I-39 with US&nbsp;51. I-39 takes on the mileposts of the latter.

After taking on US&nbsp;51, I-39 continues northward, with few directional changes through [[Marquette County, Wisconsin|Marquette County]] and [[Waushara County, Wisconsin|Waushara County]]. In [[Portage County, Wisconsin|Portage County]], the highway continues its northward direction until it reaches the [[Stevens Point, Wisconsin|Stevens Point]] region, where it bypasses the city to the east and north; four interchanges connect with the city (CTH-HH, [[U.S. Route 10 in Wisconsin|US&nbsp;10]]/[[Wisconsin Highway 66|WIS&nbsp;66]], Stanley Street, and Bus. US&nbsp;51).

From Stevens Point northward, I-39 largely parallels the path of the Wisconsin River and Lake DuBay. Following its entrance into [[Marathon County, Wisconsin|Marathon County]], [[Wisconsin Highway 153|WIS&nbsp;153]] connects to I-39 in [[Mosinee, Wisconsin|Mosinee]], adjacent to the [[Central Wisconsin Airport]]. The final north-south interchange of I-39 is exit&nbsp;185 ([[U.S. Route 51 Business (Rothschild–Wausau, Wisconsin)|Bus. US&nbsp;51]]) in [[Rothschild, Wisconsin|Rothschild]], just before I-39 crosses the Wisconsin River.

I-39 ends with exit&nbsp;187, as [[Wisconsin Highway 29|WIS&nbsp;29]] merges with US&nbsp;51 (for approximately {{convert|4|mi|km|spell=in|disp=sqbr}}); the latter highway continues north to its terminus at US&nbsp;2 at the Wisconsin–Michigan border.{{clear left}}

== History ==
=== Illinois ===
When the [[Interstate Highway System]] was first being planned, Illinois made a request for a north–south highway from [[South Beloit, Illinois|South Beloit]] to [[Salem, Illinois|Salem]]. The project was deemed a low priority and was shelved. US&nbsp;51, which ran mostly down the middle of the state, became a heavily traveled two-lane [[arterial road]], experiencing many crashes and earning the nickname "Killer&nbsp;51".<ref>{{cite news |last = Simpson |first = Kevin |date = November 3, 2002 |title = Rescuers Remember Killer Road |url = https://www.newspapers.com/clip/109431134/the-pantagraph/ |newspaper = [[The Pantagraph]] |location = Bloomington, Illinois |page = 1 |access-date = September 12, 2022 |via = [[Newspapers.com]] }}</ref>

In the late 1960s and early 1970s, a major supplemental freeway system plan was proposed, with the goal of providing Illinois residents access to freeways within 30&nbsp;minutes or less. One of the proposed routes, FAP&nbsp;412, was a route that would extend from US&nbsp;20 in [[Rockford, Illinois|Rockford]] to I-57 just north of Salem, similar to the earlier requested route. Due to traffic counts, only the portion between Rockford and [[Decatur, Illinois|Decatur]] was prioritized.<ref name="interstate_39 decatur">{{cite map |author = Illinois Department of Transportation |url = http://www.midwestroads.com/illinois/il%20supp%20fwy.pdf |format = PDF |title = Priority Primary Routes |date = April 12, 1978 |publisher = Illinois Department of Transportation |access-date = March 23, 2010 }}</ref>

Over the course of the 1970s, planning for the US&nbsp;51 supplemental freeway took place in earnest. However, debate ensued over what type of highway should be built. The [[Illinois Department of Transportation]] (IDOT) wanted the entire highway built to [[Interstate Highway standards]], but a transportation committee established to review the proposed supplemental freeway system recommended only Interstate construction between Rockford and [[Interstate 80 in Illinois|I-80]].<ref>{{cite news |first = Bill |last = Wills |date = August 27, 1976 |title = Sides Square Off in Hearings on Freeway |url = https://www.newspapers.com/clip/109434061/sides-square-off-in-hearings-on-freeway/ |work = The Pantagraph |location = Bloomington, Illinois |page = 3 |access-date = September 12, 2022 |via = Newspapers.com }}</ref> The highway from [[Oglesby, Illinois|Oglesby]] south to Decatur was recommended to be an at-grade expressway, utilizing the existing road where possible. After a decade of lobbying by interest groups, it was announced in 1986 that US&nbsp;51 would be rebuilt to Interstate standards from Oglesby to [[Normal, Illinois|Normal]].<ref>{{cite news |first = Marc |last = Featherly |title = Close Encounters on US&nbsp;51 Trip |url = https://www.newspapers.com/clip/109434150/close-encounters-on-us-51-trip/ |work = The Pantagraph |location = Bloomington, Illinois |date = March 11, 1986 |pages = A1, [https://www.newspapers.com/clip/109434255/close-encounters-on-us-51-trip-part-2/ A5] |access-date = September 12, 2022 |via = Newspapers.com }}</ref> However, due to funding concerns and local opposition, it was decided that the [[Bloomington, Illinois|Bloomington]] to Decatur segment would not be built to Interstate standards; this segment was made a four-lane expressway.<ref>{{cite news |title = Politics Helped Shelve US&nbsp;51 Work |url = https://www.newspapers.com/clip/109434390/politics-helped-shelve-us-51-work/ |work = The Pantagraph |location = Bloomington, Illinois |page = 34 |access-date = September 12, 2022 |via = Newspapers.com }}</ref>

The first segment of the freeway opened 1984 from [[Illinois Route 5|IL&nbsp;5]] (now [[Interstate 88 (west)|I-88]]) in [[Rochelle, Illinois|Rochelle]], to US&nbsp;20 in Rockford.<ref name="aaroads">{{cite web |url = http://www.interstate-guide.com/i-039.html |title = Interstate 39 |access-date = January 11, 2009 |work = Interstate Guide |publisher = AA Roads |date = July 29, 2008 |archive-date = May 14, 2012 |archive-url = https://web.archive.org/web/20120514095103/http://www.interstate-guide.com/i-039.html |url-status = dead }}{{sps|certain=y|date=March 2014}}</ref> When the freeway was completed south from IL&nbsp;5 to I-80 in 1986, IDOT officially requested an Interstate designation for the new highway, and I-39 was officially designated.<ref>{{cite web |first = Richard |last = Weingroff |date = October 15, 2013 |title = Part I: History |work = The Dwight D. Eisenhower System of Interstate and Defense Highways |url = https://www.fhwa.dot.gov/highwayhistory/data/page01.cfm |publisher = Federal Highway Administration |access-date = March 7, 2015 |at = "Interstate Route Additions Under 23 U.S.C. 139(a) As of 12/31/97" (table) }}</ref><!--There should be a better source for this. WP:USRD/AASHTO should have AASHTO's approval of the number which can be cited with [[Template:AASHTO minutes]].--> By December 1987, construction on the section of I-39 between I-80 and [[Illinois Route 251|IL&nbsp;251]] was finished. The next section, between IL&nbsp;251 and [[Interstate 55 in Illinois|I-55]] in Bloomington–Normal, was completed by 1992, although this stretch of the highway was opened in several phases as completed.<ref>{{cite web |last = Carlson |first = Rich |date = November 18, 2007 |url = http://www.n9jig.com/21-40.html |work = Illinois Highways Page |title = Routes 21 through 40 |access-date = January 11, 2009 }}{{sps|certain=y|date=March 2014}}</ref> In December 1989, the section from Bloomington–Normal to Hudson opened, a distance of about {{convert|4.4|mi|km}}.<ref name=zehr_1991>{{cite news |last = Zehr |first = Melissa |date = March 8, 1991 |title = Interstate 39: Crews Work to Link Highway by 1992 |url = https://www.newspapers.com/clip/109433868/interstate-39-crews-work-to-link-highwa/ |work = The Pantagraph |location = Bloomington, Illinois |page = 3 |access-date = September 12, 2022 |via = Newspapers.com }}</ref> In early September 1992, another segment opened from IL&nbsp;116 north to IL&nbsp;17.<ref name=davis_1992>{{cite news |work = Peoria Journal-Star |date = September 2, 1992 |url = http://infoweb.newsbank.com/iw-search/we/InfoWeb?p_action=doc&p_topdoc=1&p_docnum=1&p_sort=YMD_date%3AD&p_product=NewsBank&p_text_direct-0=document_id=%20%200EB6EAF34E7EB053%20%20&p_docid=0EB6EAF34E7EB053&p_theme=aggregated4&p_queryname=0EB6EAF34E7EB053&f_openurl=yes&p_nbid=O54E56XJMTE5NzMwNTE2NS41MDEzNzI6MTo3OnJmLTg3MjU&&p_multi=PJSB#7117694631508559435 |last = Davis |first = Jenni |title = I-39 Nearly Finished; 12 More Miles Open Today |url-access = registration |via = [[Newsbank]] }}</ref>

=== Wisconsin ===
In Wisconsin, the highway was officially designated in 1992.<ref name="WH_I39">{{cite web |last= Bessert |first= Chris |date= January 2, 2008 |title= Highways 30-39 |work= Wisconsin Highways |url= http://www.wisconsinhighways.org/listings/WiscHwys30-39.html#I-039 |publisher= Self-published |access-date= January 12, 2008}}{{sps|certain=yes|date=March 2014}}</ref> In October 1993, the [[American Association of State Highway and Transportation Officials]] (AASHTO) established part of I-39 in its northern section between Rockford and [[Rib Mountain (town), Wisconsin|Rib Mountain, Wisconsin]], then designated I-39 along existing portions of I-90, I-94, and US&nbsp;51. However, this part of the highway was not marked as I-39 for another four years, primarily because the [[Wisconsin Department of Transportation]] (WisDOT) had to reconstruct the interchange connecting I-90 and I-94 with [[Wisconsin Highway 78|WIS&nbsp;78]] near [[Portage, Wisconsin|Portage]].<ref name=jsonline_1996/> Signs denoting I-39 were placed along the highway in Wisconsin until 1996, when the section between Portage and Rib Mountain (near Wausau) received its signs.<ref name="WH_I39"/> This occurred after then–Governor [[Tommy Thompson]] designated the stretch between Portage and Wausau in 1996 after a five-year push to get the Interstate designation approved.<ref name=jsonline_1996>{{cite news |first= Steven |last= Walters |title= US&nbsp;51 will become I-39 between Portage, Wausau |work = [[Milwaukee Journal Sentinel]] |url= http://nl.newsbank.com/nl-search/we/Archives?p_product=MWSB&p_theme=mwsb&p_action=search&p_maxdocs=200&p_topdoc=1&p_text_direct-0=0EB82963E8D06152&p_field_direct-0=document_id&p_perpage=10&p_sort=YMD_date:D&s_trackval=GooglePM |date= January 16, 1996 |access-date= January 12, 2008}}</ref> The remaining segment along I-90/I-94 was not signed for I-39 until late 1998.<ref name="WH_I39" /> The section between the I-90/I-94 interchange and US&nbsp;51's interchange in Portage was previously a part of WIS&nbsp;78. That route was truncated back to its current terminus when the Interstate's designation went into effect.<ref name="WH_W78">{{cite web |last= Bessert |first= Chris |date= January 2, 2008 |title= Highways 70-79 |work= Wisconsin Highways |url= http://www.wisconsinhighways.org/listings/WiscHwys70-79.html#STH_078 |publisher= Self-published |access-date= January 12, 2008}}{{sps|certain=y|date=March 2014}}</ref> The designation of I-39 violated Wisconsin's rule of not having any state trunk highway number duplicated—Interstate, US, or state—as [[Wisconsin Highway 39|WIS&nbsp;39]] already existed.<ref name="WH_I39" />

== Exit list ==
{{jcttop|exit|state_col=state|length_ref=<ref name="WisDOT">Wisconsin State Trunk Highway Logs:<br />
*{{cite book |author= Southwest Region Staff |title= State Trunk Highway Log for Southwest Region |date= December 31, 2008 |publisher= Wisconsin Department of Transportation |location=Madison, WI |type= XLS |at= 039N}}
*{{cite book |author= North Central Region Staff |title= State Trunk Highway Log for North Central Region |date= December 31, 2008 |publisher= Wisconsin Department of Transportation |location=Rhinelander, WI |type= XLS |at= 039N}}</ref>
|exit_ref=<ref name="WisDOT1">{{cite web |author= Wisconsin Department of Transportation |publisher= Wisconsin Department of Transportation |title= Exit numbers on US&nbsp;51 and I-39 |work= Exit numbers on Wisconsin's freeways |url= http://www.dot.wisconsin.gov/travel/road/exits-us51-i39.htm |access-date= June 30, 2007 |archive-url= https://web.archive.org/web/20070607170750/http://www.dot.wisconsin.gov/travel/road/exits-us51-i39.htm |archive-date= June 7, 2007 |url-status= dead }}</ref>}}
{{ILint|exit
|sspan=36
|county=McLean
|cspan=4
|location=Normal
|lspan=2
|mile=0.00
|exit=—
|type=concur
|road={{jct|state=IL|I|55|US|51|dir2=south|to3=to|I|74|city1=Chicago|location2=[[St. Louis]]|city3=Decatur|city4=Peoria|city5=Champaign|extra=airport}}
|notes=Southern terminus of I-39; southern end of US&nbsp;51 concurrency; I-55 exit 164; [[Central Illinois Regional Airport]]
}}
{{ILint|exit
|mile=1.53
|exit=2
|road={{jct|state=IL|US-Bus|51|dab1=Bloomington–Normal|dir1=south|city1=Bloomington|city2=Normal|name1=Main Street}}
|notes=
}}
{{ILint|exit
|location=Hudson
|mile=4.67
|exit=5
|road={{jct|state=IL|CR|12|county1=McLean|name1=Franklin Street|city1=Hudson}}
|notes=
}}
{{ILint|exit
|township=Hudson
|ctdab=McLean
|mile=7.75
|exit=8
|road={{jct|state=IL|IL|251|dir1=north|CR|8|county2=McLean|name2=Lake Bloomington Road|city1=Kappa}}
|notes=Southern terminus of IL 251
}}
{{ILint|exit
|county=Woodford
|cspan=3
|location=El Paso
|mile=14.35
|exit=14
|road={{jct|state=IL|US|24|city2=El Paso|city1=Peoria}}
|notes=
}}
{{ILint|exit
|location=Woodford
|mile=22.37
|exit=22
|road={{jct|state=IL|IL|116|city1=Peoria|city2=Pontiac}}
|notes=
}}
{{ILint|exit
|location=Minonk
|mile=26.94
|exit=27
|road={{jct|state=IL|CR|county1=Woodford|2|city1=Minonk}}
|notes=
}}
{{ILint|exit
|county=Marshall
|location=Wenona
|mile=35.02
|exit=35
|road={{jct|state=IL|IL|17|city1=Lacon|city2=Wenona}}
|notes=
}}
{{ILint|exit
|county=LaSalle
|cspan=10
|location=Lostant
|mile=41.60
|exit=41
|road={{jct|state=IL|IL|18|city1=Henry|city2=Streator}}
|notes=
}}
{{ILint|exit
|location=Tonica
|mile=48.67
|exit=48
|road={{jct|state=IL|CR|county1=LaSalle|54|name1=Reed Richardson Road|city1=Tonica}}
|notes=
}}
{{ILint|exit
|township=Eden
|ctdab=LaSalle
|lspan=2
|mile=51.70
|exit=51
|road={{jct|state=IL|IL|71|city1=Hennepin|city2=Oglesby|city3=Granville}}
|notes=
}}
{{ILint|exit
|mile=52.47
|exit=52
|road={{jct|state=IL|IL|251|city1=Peru|city2=LaSalle}}
|notes=
}}
{{ILint|exit
|location=Oglesby
|mile=53.79
|exit=54
|road={{jct|state=IL|road|Walnut Street|city1=Oglesby}}
|notes=
}}
{{jctbridge|exit
|location_special= [[Illinois River]]
|mile=
|bridge=[[Abraham Lincoln Memorial Bridge]]
}}
{{ILint|exit
|location=La Salle
|lspan=2
|mile=56.75
|exit=57
|road={{jct|state=IL|US|6|city1=LaSalle|city2=Peru|city3=Ottawa|name1=5th Street}}
|notes=
}}
{{ILint|exit
|mile=58.68
|mile2=59.46
|exit=59
|road={{jct|state=IL|I|80|city1=Chicago|location2=[[Des Moines, Iowa|Des Moines]]|city3=LaSalle|city4=Peru}}
|notes=Signed as exits 59A (east) and 59B (west); I-80 exit 79
}}
{{ILint|exit
|location=Troy Grove
|mile=66.16
|exit=66
|road={{jct|state=IL|US|52|city1=Troy Grove}}
|notes=
}}
{{ILint|exit
|location=Mendota
|mile=72.09
|exit=72
|road={{jct|state=IL|US|34|city1=Mendota|city2=Earlville}}
|notes=
}}
{{ILint|exit
|county=Lee
|cspan=3
|location=Paw Paw
|mile=82.57
|exit=82
|road={{jct|state=IL|CR|county1=Lee|10|name1=Chicago Road|city1=Paw Paw}}
|notes=
}}
{{ILint|exit
|township=Willow Creek
|ctdab=Lee
|mile=87.34
|exit=87
|road={{jct|state=IL|US|30|city1=Sterling|city2=Rock Falls|city3=Aurora}}
|notes=
}}
{{ILint|exit
|location=Steward
|mile=93.34
|exit=93
|road={{jct|state=IL|CR|county1=Lee|2|name1=Perry Road|city1=Steward}}
|notes=
}}
{{ILint|exit
|county=Ogle
|cspan=4
|location=Rochelle
|lspan=2
|mile=97.10
|mile2=97.79
|exit=97
|road={{jct|state=IL|I-Toll|88|CKC|name2=Ronald Reagan Memorial Tollway|city1=Moline|city2=Rock Island|city3=Chicago}}
|notes=Signed as exits 97A (east) and 97B (west); I-88 exit 78
}}
{{ILint|exit
|mile=99.46
|exit=99
|road={{jct|state=IL|IL|38|Lincoln|city1=DeKalb|city2=Rochelle}}
|notes=
}}
{{ILint|exit
|township=Lynnville
|ctdab=Ogle
|mile=104.50
|exit=104
|road={{jct|state=IL|IL|64|city1=Sycamore|city2=Oregon}}
|notes=
}}
{{ILint|exit
|location=Monroe Center
|mile=110.98
|exit=111
|road={{jct|state=IL|IL|72|city1=Genoa|city2=Byron|city3=Kingston}}
|notes=
}}
{{ILint|exit
|county=Winnebago
|cspan=11
|township=Rockford
|ctdab=Winnebago
|mile=115.49
|exit=115
|road={{jct|state=IL|CR|11|county1=Winnebago|name1=Baxter Road}}
|notes=
}}
{{ILint|exit
|location=Rockford
|mile=119.05
|mile2=119.56
|exit=—
|type=concur
|road={{jct|state=IL|US|20|dir1=West|name1=Rockford Bypass|city2=Freeport|city1=Rockford|extra=airport}}
|notes=Southern end of US&nbsp;20 concurrency; [[Chicago Rockford International Airport]]
}}
{{ILint|exit
|location=Cherry Valley
|lspan=3
|mile=122.17
|mspan=2
|exit=122A
|type=concur
|road={{jct|state=IL|US|20|dir1=East|city1=Belvidere}}
|notes=Northern end of US&nbsp;20 concurrency
}}
{{ILint|exit
|mile=none
|exit=122B
|road=Harrison Avenue
|notes=
}}
{{ILint|exit
|mile=122.90
|exit=—
|type=concur
|road={{jct|state=IL|I-Toll|90|dir1=East|name1=[[Jane Addams Memorial Tollway]]|city1=Chicago}}
|notes=Southern end of I-90 concurrency; I-90 exit 17; I-39 uses I-90's exit numbers from here north
}}
{{ILint|exit
|location=Rockford
|lspan=2
|mile=124.45
|exit=15
|road={{jct|state=IL|US-Bus|20|name1=State Street|dab1=Rockford}}
|notes=Last free exit northbound
}}
{{ILint|exit
|mile=127.77
|exit=12
|type=etc
|road={{jct|state=IL|CR|county1=Winnebago|55|dir1=west|name1=East Riverside Boulevard}}
|notes=Toll on northbound exit and southbound entrance
}}
{{ILint|exit
|location=Machesney Park
|mile=131.31
|exit=8
|type=etc
|road={{jct|state=IL|IL|173|name1=West Lane Road|city1=Machesney Park}}
|notes=Toll on northbound exit and southbound entrance
}}
{{ILint|exit
|location=Rockton
|mile=136.71
|type=etc
|place=South Beloit Toll Plaza 1
}}
{{ILint|exit
|location=South Beloit
|lspan=2
|mile=137.53
|exit=3
|road={{jct|state=IL|CR|9|county1=Winnebago|name1=Rockton Road}}
|notes=Last free exit southbound; northwestern end of Jane Addams Memorial Tollway
}}
{{ILint|exit
|mile=139.93
|exit=1
|type=concur
|road={{jct|state=IL|US|51|IL|75|dir1=North|city1=South Beloit}}
|notes=Northern end of US&nbsp;51 concurrency
}}
{{jctplace|exit
|river=&nbsp;
|river_wide=yes
|mile=140.25
|mile2=0.00
|line=y
|place=Illinois–Wisconsin state line
}}
{{WIint|exit
|sspan=52
|county=Rock
|cspan=8
|location=Turtle
|area=town
|lspan=3
|mile=2.48
|exit=185B
|road={{Jct|state=WI|I|43|dir1=north|city1=Milwaukee}}
|notes=I-43 exits 0A-B southbound; former [[cloverleaf interchange]]; undergoing conversion to [[directional T interchange|tri-stack interchange]].
}}
{{WIint|exit
|mile=2.46
|exit=185A
|road={{Jct|state=WI|WI|81|dir1=West|city1=Beloit|name1=Milwaukee Avenue}}
|notes=Former cloverleaf interchange; undergoing conversion to [[diverging diamond interchange]] for access to/from 43 via County route X.
}}
{{WIint|exit
|mile=4.78
|exit=183
|road={{Jct|state=WI|CTH|S|name1=Shopiere Road}}
|notes=
}}
{{WIint|exit
|location=La Prairie
|area=town
|type=concur
|mile=9.95
|exit=177
|road={{Jct|state=WI|WI|11|dir1=west|city1=Janesville|city2=Avalon|name1=Avalon Road|extra=airport}}
|notes=Southern end of WIS&nbsp;11 concurrency; [[Southern Wisconsin Regional Airport]]
}}
{{WIint|exit
|location=Janesville
|lspan=3
|mile=12.49
|exit=175
|type=concur
|road={{Jct|state=WI|I-Alt|39|dir1=north|nolink1=yes|I-Alt|43|dir2=north|nolink2=yes|WI|11|dir3=east|name2=Racine Street|city1=Delavan}}
|notes=Northern end of WIS&nbsp;11 concurrency; former [[U.S. Route 14 Business (Janesville, Wisconsin)|Bus. US&nbsp;14]]
}}
{{WIint|exit
|mile=15.61
|mile2=15.66
|exit=171B
|road={{Jct|state=WI|I-Alt|39|dir1=south|nolink1=yes|US|14|city1=Janesville}}
|notes=Formerly split into exits 171B (west) and 171C (east)
}}
{{WIint|exit
|mile=16.41
|exit=171A
|road={{Jct|state=WI|WI|26|city1=Milton}}
|notes=
}}
{{WIint|exit
|location=Fulton
|area=town
|mile=24.62
|exit=163
|road={{Jct|state=WI|WI|59|city1=Edgerton|city2=Milton|city3=Whitewater}}
|notes=
}}
{{WIint|exit
|county=Dane
|cspan=12
|location=Albion
|area=town
|ctdab=Dane
|mile=27.60
|exit=160
|type=concur
|road={{Jct|state=WI|US|51|WI|73|WI|106|dir1=south|city1=Edgerton|city2=Deerfield}}
|notes=Southern end of US&nbsp;51 concurrency
}}
{{WIint|exit
|location=Christiana
|area=town
|ctdab=Dane
|mile=31.30
|exit=156
|type=concur
|road={{Jct|state=WI|US|51|dir1=north|city1=Stoughton}}
|notes=Northern end of US&nbsp;51 concurrency
}}
{{WIint|exit
|location=Pleasant Springs
|area=town
|mile=40.40
|exit=147
|road={{Jct|state=WI|CTH|N|city1=Stoughton|city2=Cottage Grove}}
|notes=
}}
{{WIint|exit
|location=Blooming Grove
|area=town
|mile=45.54
|exit=142
|road={{Jct|state=WI|US|12|US|18|city1=Madison|city2=Cambridge|name2=Beltline Highway}}
|notes=Signed as exits 142A (west) and 142B (east); US&nbsp;12 exit 267
}}
{{WIint|exit
|location=Madison
|lspan=5
|mile=49.39
|exit=138B
|road={{Jct|state=WI|WI|30|dir1=west|city1=Madison|extra=airport}}
|notes=Left exit and entrance northbound; serves [[Dane County Airport]]; WIS&nbsp;30 exit 3 eastbound and exit 240A westbound
}}
{{WIint|exit
|lspan=2
|mile=49.74
|exit=138A
|type=concur
|road={{Jct|state=WI|I|94|dir1=east|city1=Milwaukee}}
|notes=Left exit and entrance southbound; southern end of I-94 concurrency; I-94 exit 240
}}
{{WIint|exit
|mile=51.74
|exit=135C
|type=incomplete
|road=High Crossing Boulevard
|notes=Northbound exit and southbound entrance
}}
{{WIint|exit
|mile=51.96
|mile2=52.00
|mspan=2
|exit=135B
|road={{Jct|state=WI|US|151|dir1=north|city1=Sun Prairie}}
|notes=[[Cloverleaf interchange]]
|nspan=2
}}
{{WIint|exit
|mile=none
|exit=135A
|road={{Jct|state=WI|US|151|dir1=south|city1=Madison}}
|notes=none
}}
{{WIint|exit
|location=Burke
|area=town
|mile=55.20
|exit=132
|road={{Jct|state=WI|US|51|city1=Madison|city2=De Forest|name1=Stoughton Road}}
|notes=
}}
{{WIint|exit
|location=Windsor
|area=CDP
|mile=56.68
|exit=131
|road={{Jct|state=WI|WI|19|city1=Waunakee|city2=Sun Prairie}}
|notes=
}}
{{WIint|exit
|location=Vienna
|area=town
|mile=60.93
|exit=126
|road={{Jct|state=WI|CTH|V|city1=Dane|city2=De Forest}}
|notes=
}}
{{WIint|exit
|county=Columbia
|cspan=8
|location=Arlington
|area=town
|mile=67.97
|exit=119
|road={{Jct|state=WI|WI|60|city1=Lodi|city2=Arlington|city3=Columbus}}
|notes=
}}
{{WIint|exit
|location=Dekorra
|area=town
|mile=71.99
|exit=115
|road={{Jct|state=WI|CTH|CS|city1=Poynette|city2=Lake Wisconsin}}
|notes=
}}
{{WIint|exit
|location=Caledonia
|area=town
|ctdab=Columbia
|lspan=3
|mile=78.63
|exit=—
|type=concur
|road={{Jct|state=WI|I|90|dir1=west|I|94|dir2=West|city1=Wisconsin Dells}}
|notes=Northern end of I-90/I-94 concurrency; I-90 exit 108B
}}
{{WIint|exit
|mile=79.26
|exit=84
|road={{Jct|state=WI|WI|78|dir1=South|city1=Merrimac}}
|notes=Signed as exit 108A northbound
}}
{{WIint|exit
|mile=79.73
|exit=85
|road=Cascade Mountain Road
|notes=
}}
{{WIint|exit
|location=Portage
|lspan=2
|mile=81.73
|exit=87
|road={{Jct|state=WI|WI|33|city1=Portage|city2=Baraboo|name1=Cook Street}}
|notes=
}}
{{WIint|exit
|mile=84.13
|exit=89
|road={{Jct|state=WI|WI|16|WI|127|to2=to|city1=Portage|city2=Wisconsin Dells|city3=Columbus|name1=Wisconsin Street}}
|notes=Signed as exits 89A (east) and 89B (west) northbound
}}
{{WIint|exit
|location=Fort Winnebago
|area=town
|mile=85.79
|exit=92
|type=concur
|road={{Jct|state=WI|US|51|dir1=South|city1=Portage|name1=New Pinery Road}}
|notes=Southern end of US&nbsp;51 concurrency; exit numbers from here north based on US&nbsp;51's mileposts
}}
{{WIint|exit
|county=Marquette
|cspan=4
|location=Moundville
|area=town
|mile=94.43
|exit=100
|type=concur
|road={{Jct|state=WI|WI|23|CTH|P|dir1=West|city1=Wisconsin Dells|city2=Endeavor}}
|notes=Southern end of WIS&nbsp;23 concurrency
}}
{{WIint|exit
|location=Oxford
|area=town
|lspan=2
|mile=98.61
|exit=104
|type=incomplete
|road={{Jct|state=WI|CTH|D|city1=Packwaukee}}
|notes=Northbound exit and southbound entrance
}}
{{WIint|exit
|mile=100.77
|exit=106
|type=concur
|road={{Jct|state=WI|WI|23|WI|82|dir1=East|dir2=West|city1=Oxford|city2=Montello|city3=Princeton|city4=Packwaukee}}
|notes=Northern end of WIS&nbsp;23 concurrency
}}
{{WIint|exit
|location=Westfield
|mile=107.32
|exit=113
|road={{Jct|state=WI|CTH|E|CTH|J|city1=Westfield|city2=Harrisville|city3=Princeton}}
|notes=
}}
{{WIint|exit
|county=Waushara
|cspan=3
|location=Coloma
|mile=118.29
|exit=124
|road={{Jct|state=WI|WI|21|city1=Coloma|city2=Necedah|city3=Wautoma|city4=Oshkosh|city5=Tomah}}
|notes=
}}
{{WIint|exit
|location=Hancock
|area=town
|mile=125.35
|exit=131
|road={{Jct|state=WI|CTH|V|city1=Hancock}}
|notes=
}}
{{WIint|exit
|location=Plainfield
|area=town
|mile=130.94
|exit=136
|road={{Jct|state=WI|WI|73|city1=Plainfield|city2=Wisconsin Rapids|city3=Wautoma|city4=Nekoosa}}
|notes=
}}
{{WIint|exit
|county=Portage
|cspan=12
|location=Pine Grove
|area=town
|ctdab=Portage
|lspan=2
|mile=134.07
|exit=139
|road={{Jct|state=WI|CTH|D|city1=Almond}}
|notes=
}}
{{WIint|exit
|mile=137.56
|exit=143
|road={{Jct|state=WI|CTH|W|city1=Bancroft|city2=Wisconsin Rapids}}
|notes=
}}
{{WIint|exit
|location=Plover
|area=town
|ctdab=Portage
|mile=145.91
|exit=151
|road={{Jct|state=WI|WI|54|US-Bus|51|dab2=Stevens Point|name1=Post Road|city1=Wisconsin Rapids|city2=Plover|city3=Waupaca}}
|notes=
}}
{{WIint|exit
|location=Plover
|area=village
|lspan=2
|mile=147.51
|exit=153
|road={{Jct|state=WI|CTH|B|city1=Wisconsin Rapids|city2=Plover|city3=Amherst|name1=Plover Road}}
|notes=
}}
{{WIint|exit
|mile=150.53
|exit=156
|road={{Jct|state=WI|CTH|HH|city1=Whiting|name1=McDill Avenue|city2=Stevens Point}}
|notes=
}}
{{WIint|exit
|location=Stevens Point
|lspan=3
|mile=152.71
|exit=158
|type=concur
|road={{Jct|state=WI|US|10|WI|66|dir1=East|dir2=West|city1=Stevens Point|city2=Waupaca|city3=Appleton|city4=Marshfield|name2=Main Street}}
|notes=Southern end of US&nbsp;10 concurrency; southern end of WI&nbsp;66 concurrency; signed as exits 158A (east) and 158B (west) northbound
}}
{{WIint|exit
|mile=153.94
|exit=159
|road={{Jct|state=WI|WI|66|dir1=East|city1=Stevens Point|city2=Rosholt|name1=Stanley Street}}
|notes=Northern end of WI&nbsp;66 concurrency
}}
{{WIint|exit
|mile=155.76
|exit=161
|road={{Jct|state=WI|US-Bus|51|dab1=Stevens Point|city1=Stevens Point|name1=Division Street}}
|notes=
}}
{{WIint|exit
|location=Hull
|ctdab=Portage
|lspan=3
|mile=157.63
|exit=163
|road=Casimir Road
|notes=To CTH-X
}}
{{WIint|exit
|mile=159.75
|mspan=2
|exit=165
|espan=2
|type=concur
|road={{Jct|state=WI|US|10|dir1=West|city1=Marshfield}}
|notes=Northern end of US&nbsp;10 concurrency
}}
{{WIint
|mile=none
|type=closed
|road={{Jct|state=WI|CTH|X}}
|notes=Former diamond interchange; removed for construction of US&nbsp;10 exit
}}
{{WIint|exit
|location=Dewey
|area=town
|ctdab=Portage
|mile=165.39
|exit=171
|road={{Jct|state=WI|CTH|DB|city1=Knowlton|city2=Lake DuBay}}
|notes=
}}
{{WIint|exit
|county=Marathon
|cspan=5
|location=Knowlton
|area=town
|mile=169.64
|exit=175
|road={{Jct|state=WI|WI|34|city1=Knowlton|city2=Wisconsin Rapids|name1=Balsam Road}}
|notes=
}}
{{WIint|exit
|location=Mosinee
|mile=173.57
|exit=179
|road={{Jct|state=WI|WI|153|city1=Mosinee|city2=Elderon|extra=airport}}
|notes=[[Central Wisconsin Airport]]
}}
{{WIint|exit
|location=Kronenwetter
|mile=175.39
|exit=181
|road=Maple Ridge Road
|notes=
}}
{{WIint|exit
|location=Rothschild
|mile=179.52
|exit=185
|road={{Jct|state=WI|US-Bus|51|dab1=Wausau|city1=Rothschild|city2=Kronenwetter}}
|notes=
}}
{{WIint|exit
|location=Rib Mountain
|area=village
|type=concur
|mile=182.14
|exit=187
|road={{Jct|state=WI|WI|29|dir1=East|city1=Weston|city2=Green Bay}}<br />{{jct|state=WI|US|51|WI|29|dir1=North|dir2=West|city1=Wausau|city2=Chippewa Falls}}
|notes=Northern terminus;<ref>{{cite map |author = Wisconsin Department of Transportation |date = December 31, 2017 |title = Designated Freeways & Expressways |url = https://wisconsindot.gov/Documents/travel/road/hwy-maps/sthmapeast.pdf |scale = Scale not given |location = Madison |publisher = Wisconsin Department of Transportation |access-date = April 4, 2020 }}</ref> northern end of US&nbsp;51 concurrency; freeway continues as US&nbsp;51/WIS&nbsp;29
}}
{{jctbtm|col=8|keys=closed,concur,etc,incomplete}}

== See also ==
*{{portal-inline|Illinois}}
*{{portal-inline|U.S. Roads}}

== References ==
{{reflist}}

== External links ==
{{Attached KML|display=title,inline}}
{{Commons category|Interstate 39}}
*[https://web.archive.org/web/20121011012812/http://highwayexplorer.com/il_EndsPage.php?id=3039&section=1 Illinois Highway Ends: Interstate 39]

{{Interstates}}

[[Category:Interstate 39| ]]
[[Category:Interstate Highway System|39]]
[[Category:Interstate Highways in Illinois|39]]
[[Category:Interstate Highways in Wisconsin|39]]
[[Category:Transportation in McLean County, Illinois]]
[[Category:Transportation in Woodford County, Illinois]]
[[Category:Transportation in Marshall County, Illinois]]
[[Category:Transportation in LaSalle County, Illinois]]
[[Category:Transportation in Lee County, Illinois]]
[[Category:Transportation in Ogle County, Illinois]]
[[Category:Transportation in Winnebago County, Illinois]]
[[Category:Transportation in Rock County, Wisconsin]]
[[Category:Transportation in Dane County, Wisconsin]]
[[Category:Transportation in Columbia County, Wisconsin]]
[[Category:Transportation in Marquette County, Wisconsin]]
[[Category:Transportation in Waushara County, Wisconsin]]
[[Category:Transportation in Portage County, Wisconsin]]
[[Category:Transportation in Marathon County, Wisconsin]]