Ohio County Map, List of Counties in Ohio with Seats

The U.S. state of Ohio is divided into 88 counties. Explore the Ohio County Map, list of Counties in Ohio along with their County Seats in alphabetical order and check their population, areas and the date of formation.

Ohio County Map

Ohio County Map About Ohio County Map: The map showing the county boundary, all counties boundary, state capital and neighbouring states.

Ohio More Maps & Info

Ohio MapOhio County MapOhio Cities Map
Ohio Zip CodesWhere is OhioWhere is Akron
Ohio Area CodesOhio Blank MapOhio River Map
Ohio Physical MapOhio Road MapWhere is Cincinnati
Where is Cleveland/a>Where is ColumbusWhere is Toledo

About Counties of Ohio

U.S State of Ohio is located in the Midwestern part of United States of America. The capital city of the state is Columbus. Columbus is the largest city in the state of Ohio. The state is the thirty fourth largest state by area. The state shares the borders with Lake Erie which is located to the north, Pennsylvania in the east, West Virginia to the southeast, Indiana to the west. The state is also known as “Buckeye State”. State has the total are of 40,860.69 square miles.

Counties in Ohio are 88 in number. The largest County by area in the state is Ashtabula County which is in 702.44 square miles. The smallest county is Lake County. Among the Counties in Ohio Franklin County has the highest population with 1,323,807 citizens. The other counties that have huge population are Hamilton County and Summit County. Of all Counties in Ohio Delaware is the richest county that earns $42,069 Per Capita Income. Adam County is the poorest county in the state. Adam County`s Per Capita Income is $39,079.

U.S state of Ohio has three branches of government namely Legislative branch, Executive branch and Judicial branch like all other states of the country. The local government of Ohio consists of 88 counties, Municipalities which include cities and villages. There are 251 cities towns and 681 villages and 904 special districts. According to the Constitution of Ohio and the rules and regulation of government Municipalities have in fact complete authority of home rule powers. Municipalities perhaps adopt various things like a charter, ordinances and resolutions for self- government. Each and every municipality can chose its own form of government. A lot of services are provided by city government for the citizens of Ohio. Most of Counties in Ohio are governed by Commissioners a sheriff, a coroner, an auditor, a treasurer, prosecutor, engineer a recorder and clerk of the court of the court of common.

The U.S. state of Ohio has 88 counties. Ohio is the 34th-largest state by area and with a population of nearly 11.7 million, is the seventh-most populous State. Ohio is located in the Midwestern region of the United States.

List of Ohio Counties and County Seat

S.NCountyCounty SeatPopulation(2011)Area Formed
1Adams CountyWest Union28,550583.91 sq miJuly 10, 1797
2Allen CountyLima106,331404.43 sq miMarch 1, 1820
3Ashland CountyAshland53,139424.37 sq miFebruary 24, 1846
4Ashtabula CountyJefferson101,497702.44 sq miJune 7, 1807
5Athens CountyAthens64,757506.76 sq miMarch 1, 1805
6Auglaize CountyWapakoneta45,949401.25 sq miFebruary 14, 1848
7Belmont CountySt. Clairsville70,400537.35 sq miSeptember 7, 1801
8Brown CountyGeorgetown44,846491.76 sq miMarch 1, 1818
9Butler CountyHamilton368,130467.27 sq miMay 1, 1803
10Carroll CountyCarrollton28,836394.67 sq miJanuary 1, 1833
11Champaign CountyUrbana40,097428.56 sq miMarch 1, 1805
12Clark CountySpringfield138,333399.86 sq miMarch 1, 1818
13Clermont CountyBatavia197,363451.99 sq miDecember 6, 1800
14Clinton CountyWilmington42,040410.88 sq miMarch 1, 1810
15Columbiana CountyLisbon107,841532.46 sq miMay 1, 1803
16Coshocton CountyCoshocton36,901564.07 sq miJanuary 31, 1810
17Crawford CountyBucyrus43,784402.11 sq miApril 1, 1820
18Cuyahoga CountyCleveland1,280,122458.49 sq miJune 7, 1807
19Darke CountyGreenville52,959599.80 sq miJanuary 3, 1809
20Defiance CountyDefiance39,037411.16 sq miApril 7, 1845
21Delaware CountyDelaware174,214442.41 sq miApril 1, 1808
22Erie CountySandusky77,079254.88 sq miMarch 15, 1838
23Fairfield CountyLancaster146,156505.11 sq miDecember 9, 1800
24Fayette CountyWashington Court House29,030406.58 sq miMarch 1, 1810
25Franklin CountyColumbus1,163,414539.87 sq miApril 30, 1803
26Fulton CountyWauseon42,698406.78 sq miApril 1, 1850
27Gallia CountyGallipolis30,934468.78 sq miApril 30, 1803
28Geauga CountyChardon93,389403.66 sq miMarch 1, 1806
29Greene CountyXenia161,573414.88 sq miMay 1, 1803
30Guernsey CountyCambridge40,087521.90 sq miMarch 1, 1810
31Hamilton CountyCincinnati802,374407.36 sq miJanuary 2, 1790
32Hancock CountyFindlay74,782531.35 sq miApril 1, 1820
33Hardin CountyKenton32,058470.29 sq miApril 1, 1820
34Harrison CountyCadiz15,864403.53 sq miFebruary 1, 1813
35Henry CountyNapoleon28,215416.50 sq miApril 1, 1820
36Highland CountyHillsboro43,589553.28 sq miMay 1, 1805
37Hocking CountyLogan29,380422.75 sq miMarch 1, 1818
38Holmes CountyMillersburg42,366422.99 sq miJanuary 20, 1824
39Huron CountyNorwalk59,626492.69 sq miMarch 7, 1809
40Jackson CountyJackson33,225420.28 sq miMarch 1, 1816
41Jefferson CountySteubenville69,709409.61 sq miJuly 29, 1797
42Knox CountyMount Vernon60,921527.12 sq miMarch 1, 1808
43Lake CountyPainesville230,041228.21 sq miMarch 6, 1840
44Lawrence CountyIronton62,450454.96 sq miDecember 21, 1815
45Licking CountyNewark166,492686.50 sq miMarch 1, 1808
46Logan CountyBellefontaine45,858458.44 sq miMarch 1, 1818
47Lorain CountyElyria301,356492.50 sq miDecember 26, 1822
48Lucas CountyToledo441,815340.46 sq miJune 20, 1835
49Madison CountyLondon43,435465.44 sq miMarch 1, 1810
50Mahoning CountyYoungstown238,823415.25 sq miMarch 1, 1846
51Marion CountyMarion66,501403.84 sq miApril 1, 1820
52Medina CountyMedina176,395423 sq miFebruary 18, 1812
53Meigs CountyPomeroy23,770429.42 sq miApril 1, 1819
54Mercer CountyCelina40,814463.27 sq miApril 1, 1820
55Miami CountyTroy102,506407.04 sq miMarch 1, 1807
56Monroe CountyWoodsfield14,642455.54 sq miJanuary 29, 1813
57Montgomery CountyDayton535,153461.68 sq miMay 1, 1803
58Morgan CountyMcConnelsville15,054417.66 sq miDecember 29, 1817
59Morrow CountyMount Gilead34,827406.22 sq miMarch 1, 1848
60Muskingum CountyZanesville86,074664.63 sq miMarch 1, 1804[16][17]
61Noble CountyCaldwell14,645399.00 sq miApril 1, 1851
62Ottawa CountyPort Clinton41,428254.95 sq miMarch 6, 1840
63Paulding CountyPaulding19,614416.26 sq miApril 1, 1820
64Perry CountyNew Lexington36,058409.78 sq miMarch 1, 1818
65Pickaway CountyCircleville55,698501.91 sq miMarch 1, 1810
66Pike CountyWaverly28,709441.49 sq miFebruary 1, 1815
67Portage CountyRavenna161,419492.39 sq miJune 7, 1807
68Preble CountyEaton42,270424.80 sq miMarch 1, 1808
69Putnam CountyOttawa34,499483.87 sq miApril 1, 1820
70Richland CountyMansfield124,475496.88 sq miMarch 1, 1808
71Ross CountyChillicothe78,064688.41 sq miAugust 20, 1798
72Sandusky CountyFremont60,944409.18 sq miApril 1, 1820
73Scioto CountyPortsmouth79,499612.27 sq miMay 1, 1803
74Seneca CountyTiffin56,745550.59 sq miApril 1, 1820
75Shelby CountySidney49,423409.27 sq miApril 1, 1819
76Stark CountyCanton375,586576.14 sq miFebruary 13, 1808
77Summit CountyAkron541,781419.38 sq miMarch 3, 1840
78Trumbull CountyWarren210,312616.48 sq miJuly 10, 1800
79Tuscarawas CountyNew Philadelphia92,582567.58 sq miMarch 15, 1808
80Union CountyMarysville52,300436.65 sq miApril 1, 1820
81Van Wert CountyVan Wert28,744410.09 sq miApril 1, 1820
82Vinton CountyMcArthur13,435414.08 sq miMarch 23, 1850
83Warren CountyLebanon212,693399.63 sq miMay 1, 1803
84Washington CountyMarietta61,778635.15 sq miJuly 27, 1788
85Wayne CountyWooster114,520555.36 sq miMarch 1, 1808
86Williams CountyBryan37,642421.74 sq miApril 1, 1820
87Wood CountyBowling Green125,488617.32 sq miApril 1, 1820
88Wyandot CountyUpper Sandusky22,615405.61 sq miFebruary 3, 1845

Ohio County Facts

Continent:North America
Country:United States
Location: State of Ohio
Government:County government
Largest City:Columbus
Subdivisions:cities, towns, unincorporated communities, census designated place
Area:44,825 sq mi (116,096 km2) [34th Rank in US]
Population:11,689,100 (July 1, 2019) as of U.S. Census Bureau Facts
Highest Point:Campbell Hill 1,549 ft (472 m)
Lowest Point:Ohio River 455 ft (139 m)
Timezone:Eastern: UTC -5/-4
Official Website:http://ohio.gov

Ohio Cities by County and Population

S.NNameCountyPop. (2019 U.S. Census)S.NNameCountyPop. (2019 U.S. Census)
7ParmaCuyahoga78,10317Cuyahoga FallsSummit49,106