RANKING · 2020 CENSUS · 88 SHOWN OF 88

Largest Irish population, Ohio counties · 2020

Ohio counties ranked by the number of residents who are Irish ancestry, from the 2020 American Community Survey detailed-origin tables. Each list covers the full eligible universe; download the complete data as CSV. This list covers the 88 counties in Ohio that qualify, ranked against each other statewide. The median across all 88 is 7,118.

Irish Americans: full group profile →

OhioAll states All rankings

SAME RANKING BYCities States Metros

YEAR2010 2020 2024

RANKPLACESTATEPOPIRISH POPULATIONVS 2010

01Franklin County, OHOH1,361,536153,404−7%

02Cuyahoga County, OHOH1,232,925146,457−13%

03Hamilton County, OHOH838,418102,436−13%

04Summit County, OHOH538,37671,532−14%

05Montgomery County, OHOH539,59859,939−13%

06Stark County, OHOH373,77152,287−10%

07Lucas County, OHOH423,34750,030−15%

08Butler County, OHOH400,12844,621−10%

09Lorain County, OHOH323,21943,926−12%

10Lake County, OHOH232,21740,780−6%

11Mahoning County, OHOH224,70633,567−16%

12Warren County, OHOH257,18132,856+12%

13Delaware County, OHOH242,03231,326+16%

14Medina County, OHOH185,02529,764−5%

15Clermont County, OHOH216,97728,740−19%

16Portage County, OHOH163,40427,187−1%

17Licking County, OHOH185,56425,947−1%

18Greene County, OHOH174,32222,542+8%

19Fairfield County, OHOH169,75220,959−10%

20Trumbull County, OHOH198,97220,909−31%

21Clark County, OHOH135,34018,408−12%

22Wood County, OHOH134,17618,0060%

23Columbiana County, OHOH99,37715,651−19%

24Ashtabula County, OHOH96,71312,900−20%

25Miami County, OHOH112,63412,710−8%

26Geauga County, OHOH95,67612,691−21%

27Allen County, OHOH100,88112,309−8%

28Richland County, OHOH124,89312,188−27%

29Wayne County, OHOH116,75812,011−18%

30Tuscarawas County, OHOH92,37311,115−25%

31Jefferson County, OHOH63,59710,992−8%

32Muskingum County, OHOH87,01410,689−20%

33Erie County, OHOH73,29610,198−13%

34Belmont County, OHOH64,43410,130−20%

35Ross County, OHOH76,4299,462−20%

36Athens County, OHOH63,1979,430+4%

37Scioto County, OHOH71,3659,091−23%

38Knox County, OHOH64,0028,895+3%

39Union County, OHOH73,4467,904+2%

40Hancock County, OHOH75,0347,868−5%

41Washington County, OHOH58,3897,619−27%

42Marion County, OHOH65,1157,418−27%

43Pickaway County, OHOH62,9787,130−13%

44Huron County, OHOH58,2507,118−18%

45Lawrence County, OHOH55,7106,843−15%

46Madison County, OHOH46,9856,779−4%

47Sandusky County, OHOH58,6556,718−9%

48Seneca County, OHOH54,5226,622+11%

49Fulton County, OHOH41,8536,291+24%

50Ashland County, OHOH52,5236,165+3%

51Champaign County, OHOH38,8205,908−1%

52Perry County, OHOH35,9185,763+8%

53Logan County, OHOH46,3025,645−9%

54Brown County, OHOH44,3975,428−14%

55Crawford County, OHOH41,8965,335−16%

56Guernsey County, OHOH38,3795,320−13%

57Clinton County, OHOH42,3015,265−19%

58Coshocton County, OHOH37,1885,164−2%

59Highland County, OHOH43,8235,127−21%

60Auglaize County, OHOH45,9094,967−14%

61Ottawa County, OHOH39,4814,910−1%

62Shelby County, OHOH48,0654,878−10%

63Darke County, OHOH51,5204,565−19%

64Preble County, OHOH40,6644,440−29%

65Williams County, OHOH36,5494,197−8%

66Defiance County, OHOH38,2924,021−18%

67Hocking County, OHOH27,5123,839−7%

68Morrow County, OHOH36,3053,674−27%

69Carroll County, OHOH26,4753,631−13%

70Gallia County, OHOH29,0723,613−25%

71Mercer County, OHOH42,7373,562+5%

72Hardin County, OHOH30,0723,535−27%

73Jackson County, OHOH32,8173,364−13%

74Meigs County, OHOH21,5873,295−3%

75Fayette County, OHOH28,5523,025−1%

76Pike County, OHOH27,0612,970−30%

77Henry County, OHOH27,5982,831−7%

78Wyandot County, OHOH21,5672,5290%

79Adams County, OHOH27,8652,460−44%

80Putnam County, OHOH34,3802,371−13%

81Van Wert County, OHOH29,0132,329−35%

82Holmes County, OHOH44,9701,903−31%

83Harrison County, OHOH14,0701,817−26%

84Paulding County, OHOH18,7271,746−15%

85Morgan County, OHOH13,6261,724−10%

86Monroe County, OHOH12,9941,662−22%

87Noble County, OHOH14,2761,513−21%

88Vinton County, OHOH12,6451,449−24%

SHOWING 1–88 OF 88

Download CSV (full list, 88 rows)

UPDATED 2026-09-11 · DATA: US CENSUS BUREAU DECENNIAL CENSUS