List of counties in Ohio

File:Ohio Counties Labeled White.svg

Counties of Ohio

There are 88 counties in the U.S. state of Ohio. Nine of them existed at the time of the Ohio Constitutional Convention in 1802.<ref name="Laning">Template:Cite journal. Other editions available at Template:ISBN and Google Books</ref> A tenth county, Wayne, was established on August 15, 1796, and encompassed roughly the present state of Michigan.<ref name="OH Statehood">Template:Cite book Other editions available at Template:ISBN</ref> During the Convention, the county was opposed to statehood, and was not only left out of the Convention, but dissolved; the current Wayne County is in northeastern Ohio, considerably distant from the area that was the original Wayne County.<ref name="Laning"/>

The Ohio Constitution allows counties to set up a charter government as many cities and villages do,<ref name="charter">Template:Cite book (OH county charter). Other editions available: Template:ISBN and Google Books</ref> but only Summit and Cuyahoga counties have done so,<ref name="yes">{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> the latter having been approved by voters in November 2009.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> Counties do not possess home rule powers and can do only what has been expressly authorized by the Ohio General Assembly. The elected county officials in Ohio county governments include three commissioners, a sheriff (the highest law enforcement officer in the county); prosecutor (equivalent of a district attorney in other states); coroner, engineer, Recorder, auditor, treasurer, and clerk of courts.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref><ref name="ORC Title III">{{#invoke:citation/CS1|citation |CitationClass=web }}</ref>

Population figures are based on the 2024 vintage Census population estimates. The population of Ohio was 11,883,304 at that time, an increase of 0.7% from 2020. The average population of Ohio's counties was 135,038; Franklin County was the most populous (1,356,303) and Vinton County was the least (12,545). The average land area is Template:Convert. The largest county by area is Ashtabula County at Template:Convert, and its neighbor, Lake County, is the smallest at Template:Convert. The total area of the state is Template:Convert.<ref name="cen">{{#invoke:citation/CS1|citation |CitationClass=web }}</ref><ref name="2000pop">{{#invoke:citation/CS1|citation |CitationClass=web }}</ref>

List of counties

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List of county codes

The Federal Information Processing Standard (FIPS) is used by the U.S. government to uniquely identify counties. In the following table, these codes link to the United States Census Bureau's "quick facts" for each county. Ohio's FIPS code of 39 is used to distinguish from counties in other states. For example, Adams County's unique nationwide identifier is 39001.<ref name=FIPS>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref>

Various state agencies identify counties by different coding schemes. The Ohio Department of Taxation assigns consecutive numbers for the purpose of enumerating taxing districts.<ref name="ODT">{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> The Ohio Department of Public Safety, including the Ohio Bureau of Motor Vehicles, associates these county numbers with vehicle registrations.<ref name="ODPS">Template:Cite book</ref> The Department of Transportation uses three-letter abbreviations in road inventory and traffic management applications.<ref name="ODOT">{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> For historic preservation purposes, Ohio History Connection refers to counties by two- and three-letter abbreviations in the Ohio Archaeological Inventory and Ohio Historic Inventory, respectively.<ref name="OHPO">Template:Cite news</ref>

County	Template:Abbr code	Template:Abbr<ref name="ODPS" />/Template:Abbr<ref name="ODT" /> code	Template:Abbr<ref name="OHPO" /> code	Template:Abbr<ref name="ODOT" />/Template:Abbr<ref name="OHPO" /> code
Adams County	001	01	AD	ADA
Allen County	003	02	AL	ALL
Ashland County	005	03	AS	ASD
Ashtabula County	007	04	AB	ATB
Athens County	009	05	AT	ATH
Auglaize County	011	06	AU	AUG
Belmont County	013	07	BL	BEL
Brown County	015	08	BR	BRO
Butler County	017	09	BU	BUT
Carroll County	019	10	CA	CAR
Champaign County	021	11	CH	CHP
Clark County	023	12	CL	CLA
Clermont County	025	13	CT	CLE
Clinton County	027	14	CN	CLI
Columbiana County	029	15	CO	COL
Coshocton County	031	16	CS	COS
Crawford County	033	17	CR	CRA
Cuyahoga County	035	18	CU	CUY
Darke County	037	19	DA	DAR
Defiance County	039	20	DE	DEF
Delaware County	041	21	DL	DEL
Erie County	043	22	ER	ERI
Fairfield County	045	23	FA	FAI
Fayette County	047	24	FE	FAY
Franklin County	049	25	FR	FRA
Fulton County	051	26	FU	FUL
Gallia County	053	27	GA	GAL
Geauga County	055	28	GE	GEA
Greene County	057	29	GR	GRE
Guernsey County	059	30	GU	GUE
Hamilton County	061	31	HA	HAM
Hancock County	063	32	HK	HAN
Hardin County	065	33	HR	HAR
Harrison County	067	34	HN	HAS
Henry County	069	35	HY	HEN
Highland County	071	36	HI	HIG
Hocking County	073	37	HO	HOC
Holmes County	075	38	HS	HOL
Huron County	077	39	HU	HUR
Jackson County	079	40	JA	JAC
Jefferson County	081	41	JE	JEF
Knox County	083	42	KN	KNO
Lake County	085	43	LA	LAK
Lawrence County	087	44	LE	LAW
Licking County	089	45	LI	LIC
Logan County	091	46	LO	LOG
Lorain County	093	47	LN	LOR
Lucas County	095	48	LU	LUC
Madison County	097	49	MA	MAD
Mahoning County	099	50	MH	MAH
Marion County	101	51	MN	MAR
Medina County	103	52	ME	MED
Meigs County	105	53	MS	MEG
Mercer County	107	54	MR	MER
Miami County	109	55	MI	MIA
Monroe County	111	56	MO	MOE
Montgomery County	113	57	MY	MOT
Morgan County	115	58	MG	MRG
Morrow County	117	59	MW	MRW
Muskingum County	119	60	MU	MUS
Noble County	121	61	NO	NOB
Ottawa County	123	62	OT	OTT
Paulding County	125	63	PA	PAU
Perry County	127	64	PE	PER
Pickaway County	129	65	PI	PIC
Pike County	131	66	PK	PIK
Portage County	133	67	PO	POR
Preble County	135	68	PR	PRE
Putnam County	137	69	PU	PUT
Richland County	139	70	RI	RIC
Ross County	141	71	RO	ROS
Sandusky County	143	72	SA	SAN
Scioto County	145	73	SC	SCI
Seneca County	147	74	SE	SEN
Shelby County	149	75	SH	SHE
Stark County	151	76	ST	STA
Summit County	153	77	SU	SUM
Trumbull County	155	78	TR	TRU
Tuscarawas County	157	79	TU	TUS
Union County	159	80	UN	UNI
Van Wert County	161	81	VW	VAN
Vinton County	163	82	VI	VIN
Warren County	165	83	WA	WAR
Washington County	167	84	WN	WAS
Wayne County	169	85	WE	WAY
Williams County	171	86	WI	WIL
Wood County	173	87	WO	WOO
Wyandot County	175	88	WY	WYA

See also

• Ohio county government
• List of Ohio townships
• Illinois County, Virginia, the county that formerly covered all of present-day Ohio

Further reading

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