RANKING · 2010 CENSUS · 88 SHOWN OF 88

Most population gained, Ohio counties · 2010

Ohio counties that added the most residents from the 2000 census to 2010, 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+94,436−12%

02Delaware County, OHOH242,032+64,225+49%

03Warren County, OHOH257,181+54,310+22%

04Butler County, OHOH400,128+35,323−15%

05Fairfield County, OHOH169,752+23,397+21%

06Medina County, OHOH185,025+21,237−26%

07Licking County, OHOH185,564+21,001+22%

08Clermont County, OHOH216,977+19,386−30%

09Lorain County, OHOH323,219+16,692+23%

10Greene County, OHOH174,322+13,687+23%

11Union County, OHOH73,446+11,391+27%

12Portage County, OHOH163,404+9,358−1%

13Knox County, OHOH64,002+6,421−9%

14Ross County, OHOH76,429+4,719+18%

15Wood County, OHOH134,176+4,423−43%

16Miami County, OHOH112,634+3,638−36%

17Hancock County, OHOH75,034+3,487−39%

18Holmes County, OHOH44,970+3,423−44%

19Madison County, OHOH46,985+3,222+2%

20Morrow County, OHOH36,305+3,199−18%

21Pickaway County, OHOH62,978+2,971−34%

22Wayne County, OHOH116,758+2,956−71%

23Highland County, OHOH43,823+2,714−47%

24Brown County, OHOH44,397+2,561−65%

25Athens County, OHOH63,197+2,534−5%

26Lake County, OHOH232,217+2,530−79%

27Geauga County, OHOH95,676+2,494−74%

28Perry County, OHOH35,918+1,980−21%

29Tuscarawas County, OHOH92,373+1,668−76%

30Shelby County, OHOH48,065+1,513−49%

31Clinton County, OHOH42,301+1,497−71%

32Muskingum County, OHOH87,014+1,489−41%

33Adams County, OHOH27,865+1,220−38%

34Champaign County, OHOH38,820+1,207−58%

35Hocking County, OHOH27,512+1,139−58%

36Pike County, OHOH27,061+1,014−71%

37Meigs County, OHOH21,587+698+721%

38Vinton County, OHOH12,645+629−63%

39Ashland County, OHOH52,523+616−88%

40Fulton County, OHOH41,853+614−83%

41Fayette County, OHOH28,552+597−38%

42Noble County, OHOH14,276+587−78%

43Jackson County, OHOH32,817+584−76%

44Ottawa County, OHOH39,481+443−54%

45Scioto County, OHOH71,365+304−127%

46Marion County, OHOH65,115+284−85%

47Coshocton County, OHOH37,188+246−80%

48Belmont County, OHOH64,434+174−121%

49Morgan County, OHOH13,626+157−78%

50Huron County, OHOH58,250+139−96%

51Lawrence County, OHOH55,710+131−73%

52Hardin County, OHOH30,072+113−86%

53Harrison County, OHOH14,070+8−103%

54Carroll County, OHOH26,4750−100%

55Preble County, OHOH40,664-67−103%

56Mercer County, OHOH42,737-110−107%

57Gallia County, OHOH29,072-135−217%

58Logan County, OHOH46,302-147−104%

59Putnam County, OHOH34,380-227−125%

60Wyandot County, OHOH21,567-293−145%

61Darke County, OHOH51,520-350+13%

62Defiance County, OHOH38,292-463−409%

63Monroe County, OHOH12,994-538+70%

64Auglaize County, OHOH45,909-662−133%

65Paulding County, OHOH18,727-679+248%

66Guernsey County, OHOH38,379-705−140%

67Sandusky County, OHOH58,655-848+396%

68Van Wert County, OHOH29,013-915+14%

69Henry County, OHOH27,598-995−1075%

70Summit County, OHOH538,376-1,118−104%

71Ashtabula County, OHOH96,713-1,231−142%

72Washington County, OHOH58,389-1,473−248%

73Williams County, OHOH36,549-1,546−169%

74Seneca County, OHOH54,522-1,938+85%

75Allen County, OHOH100,881-2,142+67%

76Erie County, OHOH73,296-2,472−189%

77Stark County, OHOH373,771-2,512−124%

78Crawford County, OHOH41,896-3,182+252%

79Jefferson County, OHOH63,597-4,185−35%

80Columbiana County, OHOH99,377-4,234−211%

81Richland County, OHOH124,893-4,377−261%

82Clark County, OHOH135,340-6,409+128%

83Lucas County, OHOH423,347-13,239+81%

84Trumbull County, OHOH198,972-14,804+449%

85Mahoning County, OHOH224,706-18,732+158%

86Montgomery County, OHOH539,598-23,909+62%

87Hamilton County, OHOH838,418-42,929+105%

88Cuyahoga County, OHOH1,232,925-113,856+527%

SHOWING 1–88 OF 88

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