RANKING · 2025 ESTIMATES · 88 SHOWN OF 88

Most population gained, Ohio counties

Ohio counties that added the most residents from the 2020 census to 2025, by raw count of people rather than percentage. This list covers the 88 counties in Ohio that qualify, ranked against each other statewide. The median across all 88 is -71. Biggest climber in the top 100 since 2020: Athens County, OH, up 55 places to #21.

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SAME RANKING BYCities States Metros

YEAR2000 2010 2020 2025

RANKPLACESTATEPOPPOPULATION CHANGEVS 2000

01Franklin County, OHOH1,361,536+37,729−65%

02Delaware County, OHOH242,032+27,908−35%

03Warren County, OHOH257,181+14,844−67%

04▲2Fairfield County, OHOH169,752+10,831−44%

05▲5Union County, OHOH73,446+10,662+19%

06▲2Lorain County, OHOH323,219+10,255−24%

07▼2Butler County, OHOH400,128+9,771−76%

08▲1Clermont County, OHOH216,977+8,376−70%

09▼5Hamilton County, OHOH838,418+7,779−137%

10▼3Licking County, OHOH185,564+7,045−59%

11▲2Greene County, OHOH174,322+6,356−43%

12▲3Pickaway County, OHOH62,978+4,439−1%

13▲1Miami County, OHOH112,634+3,860−32%

14▲12Madison County, OHOH46,985+3,161+1%

15▼4Medina County, OHOH185,025+2,555−91%

16▲2Montgomery County, OHOH539,598+2,289−116%

17▼5Wood County, OHOH134,176+1,928−75%

18▲9Portage County, OHOH163,404+1,613−83%

19▲13Morrow County, OHOH36,305+1,355−65%

20▲1Knox County, OHOH64,002+1,281−82%

21▲55Athens County, OHOH63,197+766−71%

22▼2Holmes County, OHOH44,970+747−88%

23▲33Brown County, OHOH44,397+721−90%

24▲4Muskingum County, OHOH87,014+604−76%

25▲13Coshocton County, OHOH37,188+576−53%

26▲18Perry County, OHOH35,918+510−80%

27▲10Highland County, OHOH43,823+506−90%

28▲25Adams County, OHOH27,865+388−80%

29▲5Clinton County, OHOH42,301+283−94%

30▼11Geauga County, OHOH95,676+279−97%

31▼9Mercer County, OHOH42,737+209−86%

32▲10Jackson County, OHOH32,817+164−93%

33▲6Noble County, OHOH14,276+161−94%

34▼5Logan County, OHOH46,302+152−96%

35▼4Hancock County, OHOH75,034+114−98%

36▲29Champaign County, OHOH38,820+106−96%

37▼7Van Wert County, OHOH29,013+82−110%

38▲7Ashland County, OHOH52,523+76−98%

39▲9Defiance County, OHOH38,292+6−96%

40▲28Pike County, OHOH27,061-27−101%

41▼16Richland County, OHOH124,893-43−102%

42▲27Guernsey County, OHOH38,379-59−103%

43▼2Henry County, OHOH27,598-64−163%

44▼9Putnam County, OHOH34,380-71−108%

45▲4Paulding County, OHOH18,727-79−59%

46▲26Crawford County, OHOH41,896-129−86%

47▼30Wayne County, OHOH116,758-136−101%

48▲23Gallia County, OHOH29,072-148−229%

49▼6Vinton County, OHOH12,645-155−109%

50▲7Shelby County, OHOH48,065-165−106%

51▲7Morgan County, OHOH13,626-176−125%

52▲22Sandusky County, OHOH58,655-241+41%

53▲2Marion County, OHOH65,115-244−113%

54▲21Carroll County, OHOH26,475-246−111%

55▼4Huron County, OHOH58,250-315−110%

56▼10Wyandot County, OHOH21,567-333−151%

57▲3Preble County, OHOH40,664-335−115%

58▼4Darke County, OHOH51,520-361+16%

59▼43Lake County, OHOH232,217-386−103%

60▼1Monroe County, OHOH12,994-391+23%

61▼25Fayette County, OHOH28,552-399−141%

62▲2Harrison County, OHOH14,070-413+80%

63▼39Auglaize County, OHOH45,909-513−125%

64▼3Hocking County, OHOH27,512-538−120%

65▲5Seneca County, OHOH54,522-547−48%

66▼26Williams County, OHOH36,549-553−125%

67Meigs County, OHOH21,587-623−833%

68▼5Hardin County, OHOH30,072-624−175%

69▲8Clark County, OHOH135,340-661−76%

70▼20Ross County, OHOH76,429-664−117%

71▼38Fulton County, OHOH41,853-860−124%

72▲7Ashtabula County, OHOH96,713-861−130%

73▼21Ottawa County, OHOH39,481-883−192%

74▼51Tuscarawas County, OHOH92,373-890−113%

75▼28Stark County, OHOH373,771-1,082−110%

76▲4Allen County, OHOH100,881-1,325+3%

77▼4Washington County, OHOH58,389-1,382−239%

78▲4Jefferson County, OHOH63,597-1,652−74%

79▼17Summit County, OHOH538,376-2,052−107%

80▼2Belmont County, OHOH64,434-2,063+143%

81▼15Erie County, OHOH73,296-2,326−184%

82▲2Columbiana County, OHOH99,377-2,500−166%

83▼2Lawrence County, OHOH55,710-2,530−622%

84▼1Scioto County, OHOH71,365-2,643+133%

85Trumbull County, OHOH198,972-3,005+11%

86Mahoning County, OHOH224,706-3,908−46%

87Lucas County, OHOH423,347-7,932+9%

88Cuyahoga County, OHOH1,232,925-31,892+76%

SHOWING 1–88 OF 88

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UPDATED 2026-09-11 · DATA: US CENSUS BUREAU POPULATION ESTIMATES