RANKING · 2020 CENSUS · 88 SHOWN OF 88

Fastest growing, Ohio counties · 2020

Ohio counties ranked by population growth from the 2010 census to 2020. This list covers the 88 counties in Ohio that qualify, ranked against each other statewide.

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SAME RANKING BYCities States Metros

RELATEDLargest by population Fastest shrinking Most population gained Most population lost Most densely populated Most sparsely populated

YEAR2000 2010 2020 2025

RANKPLACESTATEPOPPOPULATION GROWTHVS 2000

01Delaware County, OHOH242,032+22.9%−64%

02Union County, OHOH73,446+20.0%−28%

03Warren County, OHOH257,181+13.9%−64%

04Franklin County, OHOH1,361,536+13.8%+23%

05Fairfield County, OHOH169,752+8.7%−53%

06Licking County, OHOH185,564+7.2%−46%

07Miami County, OHOH112,634+6.1%+0%

08Butler County, OHOH400,128+6.0%−57%

09Medina County, OHOH185,025+5.9%−75%

10Clermont County, OHOH216,977+5.7%−69%

11Wood County, OHOH134,176+5.4%−22%

12Pickaway County, OHOH62,978+5.1%−45%

13Holmes County, OHOH44,970+4.4%−76%

14Mercer County, OHOH42,737+4.2%+12%

15Greene County, OHOH174,322+4.0%−52%

16Lorain County, OHOH323,219+3.9%−23%

17Hamilton County, OHOH838,418+3.5%−246%

18Knox County, OHOH64,002+3.0%−80%

19Geauga County, OHOH95,676+2.2%−82%

20Wayne County, OHOH116,758+2.1%−79%

21Lake County, OHOH232,217+1.1%−80%

22Auglaize County, OHOH45,909+1.0%−77%

23Madison County, OHOH46,985+0.9%−89%

24Tuscarawas County, OHOH92,373+0.7%−91%

25Van Wert County, OHOH29,013+0.7%−125%

26Logan County, OHOH46,302+0.6%−93%

27Montgomery County, OHOH539,598+0.4%−116%

28Muskingum County, OHOH87,014+0.4%−87%

29Richland County, OHOH124,893+0.4%−83%

30Morrow County, OHOH36,305+0.4%−97%

31Portage County, OHOH163,404+0.2%−97%

32Hancock County, OHOH75,034+0.2%−98%

33Fulton County, OHOH41,853+0.0%−100%

34Clinton County, OHOH42,301-0.1%−100%

35Putnam County, OHOH34,380-0.1%−105%

36Stark County, OHOH373,771-0.2%−107%

37Summit County, OHOH538,376-0.2%−105%

38Fayette County, OHOH28,552-0.3%−108%

39Highland County, OHOH43,823-0.6%−104%

40Coshocton County, OHOH37,188-0.8%−123%

41Cuyahoga County, OHOH1,232,925-1.2%−7%

42Ross County, OHOH76,429-1.2%−121%

43Ashland County, OHOH52,523-1.3%−112%

44Williams County, OHOH36,549-1.4%−124%

45Clark County, OHOH135,340-1.7%−11%

46Marion County, OHOH65,115-1.7%−157%

47Jackson County, OHOH32,817-1.7%−122%

48Huron County, OHOH58,250-1.8%−131%

49Perry County, OHOH35,918-1.8%−123%

50Erie County, OHOH73,296-1.9%−152%

51Defiance County, OHOH38,292-1.9%−605%

52Henry County, OHOH27,598-2.0%−659%

53Darke County, OHOH51,520-2.0%+252%

54Lucas County, OHOH423,347-2.4%+51%

55Shelby County, OHOH48,065-2.4%−136%

56Ottawa County, OHOH39,481-2.6%−208%

57Brown County, OHOH44,397-2.6%−112%

58Seneca County, OHOH54,522-3.0%+68%

59Preble County, OHOH40,664-3.0%−154%

60Wyandot County, OHOH21,567-3.2%−208%

61Washington County, OHOH58,389-3.2%−303%

62Sandusky County, OHOH58,655-3.4%+1118%

63Champaign County, OHOH38,820-3.4%−143%

64Athens County, OHOH63,197-3.6%−180%

65Noble County, OHOH14,276-3.6%−115%

66Adams County, OHOH27,865-3.8%−149%

67Ashtabula County, OHOH96,713-3.9%−233%

68Allen County, OHOH100,881-3.9%+232%

69Trumbull County, OHOH198,972-4.0%+235%

70Crawford County, OHOH41,896-4.0%+113%

71Guernsey County, OHOH38,379-4.1%−191%

72Paulding County, OHOH18,727-4.1%+333%

73Hardin County, OHOH30,072-4.2%−258%

74Mahoning County, OHOH224,706-4.3%+56%

75Hocking County, OHOH27,512-4.5%−143%

76Vinton County, OHOH12,645-4.7%−131%

77Columbiana County, OHOH99,377-5.5%−258%

78Gallia County, OHOH29,072-5.5%−1591%

79Belmont County, OHOH64,434-5.5%+365%

80Pike County, OHOH27,061-5.6%−140%

81Jefferson County, OHOH63,597-6.4%−20%

82Meigs County, OHOH21,587-6.6%−1875%

83Lawrence County, OHOH55,710-6.7%−959%

84Scioto County, OHOH71,365-6.9%+390%

85Carroll County, OHOH26,475-7.3%−184%

86Morgan County, OHOH13,626-8.3%−268%

87Monroe County, OHOH12,994-8.6%+320%

88Harrison County, OHOH14,070-8.7%+511%

SHOWING 1–88 OF 88

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