RANKING · 2000 CENSUS · 88 SHOWN OF 88

Largest by population, Ohio counties · 2000

The most populous Ohio counties as of the 2000 population estimates. This list covers the 88 counties in Ohio that qualify, ranked against each other statewide.

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SAME RANKING BYCities States Metros ZIP codes

RELATEDFastest growing Fastest shrinking Most population gained Most population lost Most densely populated Most sparsely populated

YEAR1990 2000 2010 2020 2025

RANKPLACESTATETOTAL POPULATIONVS 1990

01Cuyahoga County, OHOH1,393,978−1%

02Franklin County, OHOH1,068,978+11%

03Hamilton County, OHOH845,303−2%

04Montgomery County, OHOH559,062−3%

05Summit County, OHOH542,899+5%

06Lucas County, OHOH455,054−2%

07Stark County, OHOH378,098+3%

08Butler County, OHOH332,807+14%

09Lorain County, OHOH284,664+5%

10Mahoning County, OHOH257,555−3%

11Lake County, OHOH227,511+6%

12Trumbull County, OHOH225,116−1%

13Clermont County, OHOH177,977+19%

14Warren County, OHOH158,383+39%

15Portage County, OHOH152,061+7%

16Medina County, OHOH151,095+23%

17Greene County, OHOH147,886+8%

18Licking County, OHOH145,491+13%

19Clark County, OHOH144,742−2%

20Richland County, OHOH128,852+2%

21Fairfield County, OHOH122,759+19%

22Wood County, OHOH121,065+7%

23Columbiana County, OHOH112,075+4%

24Wayne County, OHOH111,564+10%

25Delaware County, OHOH109,989+64%

26Allen County, OHOH108,473−1%

27Ashtabula County, OHOH102,728+3%

28Miami County, OHOH98,868+6%

29Tuscarawas County, OHOH90,914+8%

30Geauga County, OHOH90,895+12%

31Muskingum County, OHOH84,585+3%

32Erie County, OHOH79,551+4%

33Scioto County, OHOH79,195−1%

34Jefferson County, OHOH73,894−8%

35Ross County, OHOH73,345+6%

36Hancock County, OHOH71,295+9%

37Belmont County, OHOH70,226−1%

38Marion County, OHOH66,217+3%

39Washington County, OHOH63,251+2%

40Lawrence County, OHOH62,319+1%

41Athens County, OHOH62,223+4%

42Sandusky County, OHOH61,792−0%

43Huron County, OHOH59,487+6%

44Seneca County, OHOH58,683−2%

45Knox County, OHOH54,500+15%

46Darke County, OHOH53,309−1%

47Pickaway County, OHOH52,727+9%

48Ashland County, OHOH52,523+11%

49Shelby County, OHOH47,910+7%

50Crawford County, OHOH46,966−2%

51Auglaize County, OHOH46,611+5%

52Logan County, OHOH46,005+9%

53Preble County, OHOH42,337+6%

54Brown County, OHOH42,285+21%

55Fulton County, OHOH42,084+9%

56Ottawa County, OHOH40,985+2%

57Mercer County, OHOH40,924+4%

58Union County, OHOH40,909+28%

59Highland County, OHOH40,875+14%

60Guernsey County, OHOH40,792+5%

61Clinton County, OHOH40,543+14%

62Madison County, OHOH40,213+8%

63Defiance County, OHOH39,500+0%

64Williams County, OHOH39,188+6%

65Holmes County, OHOH38,943+19%

66Champaign County, OHOH38,890+8%

67Coshocton County, OHOH36,655+3%

68Putnam County, OHOH34,726+3%

69Perry County, OHOH34,078+8%

70Jackson County, OHOH32,641+8%

71Hardin County, OHOH31,945+3%

72Morrow County, OHOH31,628+14%

73Gallia County, OHOH31,069+0%

74Van Wert County, OHOH29,659−3%

75Henry County, OHOH29,210+0%

76Carroll County, OHOH28,836+9%

77Fayette County, OHOH28,433+4%

78Hocking County, OHOH28,241+11%

79Pike County, OHOH27,695+14%

80Adams County, OHOH27,330+8%

81Meigs County, OHOH23,072+0%

82Wyandot County, OHOH22,908+3%

83Paulding County, OHOH20,293−1%

84Harrison County, OHOH15,856−1%

85Monroe County, OHOH15,180−2%

86Morgan County, OHOH14,897+5%

87Noble County, OHOH14,058+24%

88Vinton County, OHOH12,806+15%

SHOWING 1–88 OF 88

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UPDATED 2026-07-15 · DATA: US CENSUS BUREAU DECENNIAL CENSUS