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%−41.4 pts

02Union County, OHOH73,446+20.0%−7.9 pts

03Warren County, OHOH257,181+13.9%−25.1 pts

04Franklin County, OHOH1,361,536+13.8%+2.6 pts

05Fairfield County, OHOH169,752+8.7%−9.9 pts

06Licking County, OHOH185,564+7.2%−6.2 pts

07Miami County, OHOH112,634+6.1%+0.0 pts

08Butler County, OHOH400,128+6.0%−8.1 pts

09Medina County, OHOH185,025+5.9%−17.6 pts

10Clermont County, OHOH216,977+5.7%−12.8 pts

11Wood County, OHOH134,176+5.4%−1.5 pts

12Pickaway County, OHOH62,978+5.1%−4.2 pts

13Holmes County, OHOH44,970+4.4%−14.2 pts

14Mercer County, OHOH42,737+4.2%+0.4 pts

15Greene County, OHOH174,322+4.0%−4.2 pts

16Lorain County, OHOH323,219+3.9%−1.1 pts

17Hamilton County, OHOH838,418+3.5%+5.9 pts

18Knox County, OHOH64,002+3.0%−11.8 pts

19Geauga County, OHOH95,676+2.2%−9.9 pts

20Wayne County, OHOH116,758+2.1%−7.9 pts

21Lake County, OHOH232,217+1.1%−4.5 pts

22Auglaize County, OHOH45,909+1.0%−3.5 pts

23Madison County, OHOH46,985+0.9%−7.6 pts

24Tuscarawas County, OHOH92,373+0.7%−7.4 pts

25Van Wert County, OHOH29,013+0.7%+3.3 pts

26Logan County, OHOH46,302+0.6%−8.1 pts

27Montgomery County, OHOH539,598+0.4%+3.0 pts

28Muskingum County, OHOH87,014+0.4%−2.7 pts

29Richland County, OHOH124,893+0.4%−1.8 pts

30Morrow County, OHOH36,305+0.4%−13.6 pts

31Portage County, OHOH163,404+0.2%−6.4 pts

32Hancock County, OHOH75,034+0.2%−8.6 pts

33Fulton County, OHOH41,853+0.0%−9.3 pts

34Clinton County, OHOH42,301-0.1%−14.5 pts

35Putnam County, OHOH34,380-0.1%−2.8 pts

36Stark County, OHOH373,771-0.2%−3.1 pts

37Summit County, OHOH538,376-0.2%−5.7 pts

38Fayette County, OHOH28,552-0.3%−3.8 pts

39Highland County, OHOH43,823-0.6%−15.0 pts

40Coshocton County, OHOH37,188-0.8%−4.2 pts

41Cuyahoga County, OHOH1,232,925-1.2%+0.1 pts

42Ross County, OHOH76,429-1.2%−7.0 pts

43Ashland County, OHOH52,523-1.3%−11.9 pts

44Williams County, OHOH36,549-1.4%−7.5 pts

45Clark County, OHOH135,340-1.7%+0.2 pts

46Marion County, OHOH65,115-1.7%−4.7 pts

47Jackson County, OHOH32,817-1.7%−9.7 pts

48Huron County, OHOH58,250-1.8%−7.6 pts

49Perry County, OHOH35,918-1.8%−9.8 pts

50Erie County, OHOH73,296-1.9%−5.5 pts

51Defiance County, OHOH38,292-1.9%−2.3 pts

52Henry County, OHOH27,598-2.0%−2.3 pts

53Darke County, OHOH51,520-2.0%−1.5 pts

54Lucas County, OHOH423,347-2.4%−0.8 pts

55Shelby County, OHOH48,065-2.4%−9.1 pts

56Ottawa County, OHOH39,481-2.6%−5.0 pts

57Brown County, OHOH44,397-2.6%−23.5 pts

58Seneca County, OHOH54,522-3.0%−1.2 pts

59Preble County, OHOH40,664-3.0%−8.6 pts

60Wyandot County, OHOH21,567-3.2%−6.1 pts

61Washington County, OHOH58,389-3.2%−4.9 pts

62Sandusky County, OHOH58,655-3.4%−3.1 pts

63Champaign County, OHOH38,820-3.4%−11.4 pts

64Athens County, OHOH63,197-3.6%−8.1 pts

65Noble County, OHOH14,276-3.6%−27.6 pts

66Adams County, OHOH27,865-3.8%−11.5 pts

67Ashtabula County, OHOH96,713-3.9%−6.8 pts

68Allen County, OHOH100,881-3.9%−2.7 pts

69Trumbull County, OHOH198,972-4.0%−2.8 pts

70Crawford County, OHOH41,896-4.0%−2.1 pts

71Guernsey County, OHOH38,379-4.1%−8.6 pts

72Paulding County, OHOH18,727-4.1%−3.2 pts

73Hardin County, OHOH30,072-4.2%−6.9 pts

74Mahoning County, OHOH224,706-4.3%−1.5 pts

75Hocking County, OHOH27,512-4.5%−15.1 pts

76Vinton County, OHOH12,645-4.7%−20.1 pts

77Columbiana County, OHOH99,377-5.5%−9.0 pts

78Gallia County, OHOH29,072-5.5%−5.9 pts

79Belmont County, OHOH64,434-5.5%−4.4 pts

80Pike County, OHOH27,061-5.6%−19.9 pts

81Jefferson County, OHOH63,597-6.4%+1.6 pts

82Meigs County, OHOH21,587-6.6%−6.9 pts

83Lawrence County, OHOH55,710-6.7%−7.5 pts

84Scioto County, OHOH71,365-6.9%−5.5 pts

85Carroll County, OHOH26,475-7.3%−16.1 pts

86Morgan County, OHOH13,626-8.3%−13.3 pts

87Monroe County, OHOH12,994-8.6%−6.5 pts

88Harrison County, OHOH14,070-8.7%−7.3 pts

SHOWING 1–88 OF 88

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UPDATED 2026-08-08 · DATA: US CENSUS BUREAU DECENNIAL CENSUS