Editing Research Triangle (section)

== Definitions ==
[[File:Research-triangle-north-carolina.png|thumb|A map of Research Triangle in [[North Carolina]], highlighting the locations of [[North Carolina State University]], [[Duke University]], and [[University of North Carolina at Chapel Hill]]]]
Depending on which definition of the Research Triangle region is used, as few as three or as many as 16 counties are included as part of the region. The three core counties of Wake, Durham, and Orange are the homes of the three research universities for which the area is named.

=== Combined Statistical Area ===
As of September 14, 2018, the US [[Office of Management and Budget]] (OMB) delineated the Raleigh-Durham-Cary Combined Statistical Area as consisting of two metropolitan and one micropolitan statistical areas.<ref>{{cite report |date= September 14, 2018|title= OMB Bulletin No. 18-04|url= https://bidenwhitehouse.archives.gov/wp-content/uploads/2018/09/Bulletin-18-04.pdf|publisher= Office of Management and Budget |page= 142|access-date= 2020-02-06}}</ref>  Those three statistical areas in turn are defined as consisting of a total of nine counties.  The MSAs and their constituent counties are:
* Durham-Chapel Hill MSA
** Chatham County
** Durham County
** Granville County
** Orange County
** Person County
* Henderson μSA
** Vance County
* Raleigh-Cary MSA
** Franklin County
** Johnston County
** Wake County

Prior to September 2018, the OMB had used the name Raleigh-Durham-Chapel Hill Combined Statistical Area and it included several additional counties.<ref>{{cite report |date= April 10, 2018|title= OMB Bulletin No. 18-03|url= https://bidenwhitehouse.archives.gov/wp-content/uploads/2018/04/OMB-BULLETIN-NO.-18-03-Final.pdf|publisher= Office of Management and Budget |page= 141|access-date= 2020-02-06}}</ref> The Dunn Micropolitan Statistical Area (Harnett County) and Sanford Micropolitan Statistical Area (Lee County) were moved to the Fayetteville-Sanford-Lumberton Combined Statistical Area, while the Oxford Micropolitan Statistical Area (Granville County) was folded into the Durham-Chapel Hill Metropolitan Statistical Area. The Raleigh Metropolitan Statistical Area was also renamed the Raleigh-Cary Metropolitan Statistical Area.

The table below outlines the populations of the constituent counties of the Raleigh–Durham-Cary Combined Statistical Area as of the 2020 Census.<ref>{{cite web |url=https://www.census.gov/data/tables/time-series/demo/popest/2010s-counties-total.html |title=County Population Totals and Components of Change: 2010-2020 |publisher=United States Census Bureau |access-date=2021-05-25}}</ref>{{US Census population
| 1950=483418
| 1960=534029
| 1970=628319
| 1980=765191
| 1990=962962
| 2000=1315016
| 2010=1740185
| 2020=2106463
| footnote =2020<ref>{{cite web|url= https://censusreporter.org/profiles/33000US450-raleigh-durham-cary-nc-csa/|title=Raleigh-Durham-Cary, NC CSA|publisher= censusreporter.org|access-date=June 22, 2022}}</ref> }}
{| class="wikitable sortable"
|-
! County
! 2023 Estimate
! 2020 Census
! Change
|-
|[[Wake County, North Carolina|Wake County]]
| {{change|invert=on|1190275|1129410|date=July 1, 2021}}
|-
|[[Durham County, North Carolina|Durham County]]
| {{change|invert=on|336892|324833|date=July 1, 2021}}
|-
|[[Johnston County, North Carolina|Johnston County]]
| {{change|invert=on|241955|215999|date=July 1, 2021}}
|-
|[[Orange County, North Carolina|Orange County]]
| {{change|invert=on|150626|148696|date=July 1, 2021}}
|-
|[[Chatham County, North Carolina|Chatham County]]
| {{change|invert=on|81624|76285|date=July 1, 2021}}
|-
|[[Franklin County, North Carolina|Franklin County]]
| {{change|invert=on|77001|68573|date=July 1, 2021}}
|-
|[[Granville County, North Carolina|Granville County]]
| {{change|invert=on|62192|60992|date=July 1, 2021}}
|-
|[[Vance County, North Carolina|Vance County]]
| {{change|invert=on|42301|42578|date=July 1, 2021}}
|-
|[[Person County, North Carolina|Person County]]
| {{change|invert=on|39737|39097|date=July 1, 2021}}
|- class="sortbottom"
| align="right" |'''Total'''
| {{change|invert=on|2222603|2106463|bold=on|date=July 1, 2021}}
|}

=== Regional partnerships ===
The members of the Research Triangle Regional Partnership are:<ref>{{cite web |url=https://www.researchtriangle.org/counties/ |title=Counties - Research Triangle Regional Partnership |access-date=2023-03-29}}</ref>
* [[Chatham County, North Carolina|Chatham]]
* [[Durham County, North Carolina|Durham]]
* [[Franklin County, North Carolina|Franklin]]
* [[Granville County, North Carolina|Granville]]
* [[Harnett County, North Carolina|Harnett]]
* [[Johnston County, North Carolina|Johnston]]
* [[Lee County, North Carolina|Lee]]
* [[Nash County, North Carolina|Nash]]
* [[Orange County, North Carolina|Orange]]
* [[Person County, North Carolina|Person]]
* [[Wake County, North Carolina|Wake]]
* [[Warren County, North Carolina|Warren]]
* [[Wilson County, North Carolina|Wilson]]

All counties in North Carolina are in one of 16 regional councils which provide programs and services to local governments. The Triangle J Council of Governments includes Chatham, Durham, Johnston, Lee, Moore, Orange, and Wake Counties.<ref>{{cite web |url=https://www.ncregions.org/regional-councils/|title= NC Regional Councils Map|publisher= NC Association of Regional Councils of Government|access-date= 2019-06-24}}</ref>  The northern Triangle counties of Person, Granville, Franklin, Vance, and Warren are part of the Kerr-Tar Regional Council of Governments.