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.

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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%

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

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

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

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

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

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

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

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

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

13Miami County, OHOH112,634+3,860−32%

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

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

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

17Wood County, OHOH134,176+1,928−75%

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

19Morrow County, OHOH36,305+1,355−65%

20Knox County, OHOH64,002+1,281−82%

21Athens County, OHOH63,197+766−71%

22Holmes County, OHOH44,970+747−88%

23Brown County, OHOH44,397+721−90%

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

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

26Perry County, OHOH35,918+510−80%

27Highland County, OHOH43,823+506−90%

28Adams County, OHOH27,865+388−80%

29Clinton County, OHOH42,301+283−94%

30Geauga County, OHOH95,676+279−97%

31Mercer County, OHOH42,737+209−86%

32Jackson County, OHOH32,817+164−93%

33Noble County, OHOH14,276+161−94%

34Logan County, OHOH46,302+152−96%

35Hancock County, OHOH75,034+114−98%

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

37Van Wert County, OHOH29,013+82−110%

38Ashland County, OHOH52,523+76−98%

39Defiance County, OHOH38,292+6−96%

40Pike County, OHOH27,061-27−101%

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

42Guernsey County, OHOH38,379-59−103%

43Henry County, OHOH27,598-64−163%

44Putnam County, OHOH34,380-71−108%

45Paulding County, OHOH18,727-79−59%

46Crawford County, OHOH41,896-129−86%

47Wayne County, OHOH116,758-136−101%

48Gallia County, OHOH29,072-148−229%

49Vinton County, OHOH12,645-155−109%

50Shelby County, OHOH48,065-165−106%

51Morgan County, OHOH13,626-176−125%

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

53Marion County, OHOH65,115-244−113%

54Carroll County, OHOH26,475-246−111%

55Huron County, OHOH58,250-315−110%

56Wyandot County, OHOH21,567-333−151%

57Preble County, OHOH40,664-335−115%

58Darke County, OHOH51,520-361+16%

59Lake County, OHOH232,217-386−103%

60Monroe County, OHOH12,994-391+23%

61Fayette County, OHOH28,552-399−141%

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

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

64Hocking County, OHOH27,512-538−120%

65Seneca County, OHOH54,522-547−48%

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

67Meigs County, OHOH21,587-623−833%

68Hardin County, OHOH30,072-624−175%

69Clark County, OHOH135,340-661−76%

70Ross County, OHOH76,429-664−117%

71Fulton County, OHOH41,853-860−124%

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

73Ottawa County, OHOH39,481-883−192%

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

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

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

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

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

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

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

81Erie County, OHOH73,296-2,326−184%

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

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

84Scioto 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 2026-07-15 · DATA: US CENSUS BUREAU POPULATION ESTIMATES