RANKING · 2020 CENSUS · 99 SHOWN OF 99

Largest Welsh population, Iowa counties · 2020

Iowa counties ranked by the number of residents who are Welsh 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 99 counties in Iowa that qualify, ranked against each other statewide. The median across all 99 is 85.

Welsh Americans: full group profile →

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SAME RANKING BYCities States Metros

RELATEDLargest American population Highest American population share Largest Arab population Highest Arab population share Largest Egyptian population Highest Egyptian population share

YEAR2010 2020 2024

RANKPLACESTATEPOPWELSH POPULATIONVS 2010

01Polk County, IAIA516,5464,019+4%

02Linn County, IAIA232,0281,444−22%

03Johnson County, IAIA160,0441,208+15%

04Scott County, IAIA175,259782−9%

05Dallas County, IAIA118,457774+25%

06Black Hawk County, IAIA131,532706+7%

07Story County, IAIA101,291613−22%

08Pottawattamie County, IAIA92,996420−60%

09Woodbury County, IAIA106,649415+28%

10Marion County, IAIA34,192413+30%

11Dubuque County, IAIA99,381411+9%

12Jasper County, IAIA38,153374−26%

13Warren County, IAIA57,331333−21%

14Mahaska County, IAIA21,880317+39%

15Cerro Gordo County, IAIA42,372307+10%

16Keokuk County, IAIA9,797301+133%

17Muscatine County, IAIA41,853295+7%

18Marshall County, IAIA39,890290+9%

19Clinton County, IAIA46,002266−38%

20Madison County, IAIA17,270264+5%

21Des Moines County, IAIA38,077255−19%

22Iowa County, IAIA16,504251+6%

23Washington County, IAIA22,667220−9%

24Wapello County, IAIA35,210205−62%

25Louisa County, IAIA10,416202−8%

26Henry County, IAIA19,349176−24%

27Webster County, IAIA36,838149−9%

28Union County, IAIA11,829135−25%

29Jackson County, IAIA19,288135−23%

30Cass County, IAIA12,960133+48%

31Buchanan County, IAIA20,883130+13%

32Buena Vista County, IAIA20,449128+44%

33Jones County, IAIA21,253121+61%

34Lee County, IAIA32,306120+5%

35Winneshiek County, IAIA19,733118+84%

36Cedar County, IAIA18,359113−42%

37Monroe County, IAIA7,406113−6%

38Boone County, IAIA26,799111−78%

39Delaware County, IAIA17,674109−15%

40Fayette County, IAIA19,047108+38%

41Page County, IAIA14,856103−13%

42Plymouth County, IAIA25,697102−16%

43Cherokee County, IAIA11,369100+69%

44Appanoose County, IAIA12,07793−40%

45Hardin County, IAIA16,45591+10%

46Benton County, IAIA26,00490−67%

47Fremont County, IAIA6,52289+123%

48Dickinson County, IAIA18,07787+23%

49Clay County, IAIA16,20285−70%

50Lucas County, IAIA8,84785+52%

51Mills County, IAIA14,79381−41%

52Tama County, IAIA16,79679−11%

53Montgomery County, IAIA10,00274−70%

54Guthrie County, IAIA10,78273−53%

55Decatur County, IAIA7,65572−64%

56Winnebago County, IAIA10,25172+3%

57Davis County, IAIA9,23070+52%

58Jefferson County, IAIA15,29168−15%

59Wright County, IAIA12,80167−37%

60Calhoun County, IAIA9,56266+175%

61Bremer County, IAIA25,29664−26%

62Poweshiek County, IAIA18,36863−24%

63Allamakee County, IAIA14,23861+510%

64Clayton County, IAIA16,84559−66%

65Grundy County, IAIA12,36157−20%

66Emmet County, IAIA9,10755+17%

67Harrison County, IAIA14,62352−60%

68Adair County, IAIA7,40349+145%

69Clarke County, IAIA9,57448−33%

70Greene County, IAIA8,65848+2%

71Sioux County, IAIA36,77447+292%

72Worth County, IAIA7,33846+48%

73Howard County, IAIA9,41542−53%

74Franklin County, IAIA9,86841−20%

75Kossuth County, IAIA14,32239+3%

76Crawford County, IAIA16,23736−22%

77Humboldt County, IAIA9,40936+100%

78Pocahontas County, IAIA6,81936−27%

79Monona County, IAIA8,53935+3%

80Van Buren County, IAIA7,13135−33%

81Ringgold County, IAIA4,64233+50%

82Taylor County, IAIA5,83531+19%

83Carroll County, IAIA20,30330−69%

84Butler County, IAIA14,04929−52%

85Hancock County, IAIA10,52827−18%

86Ida County, IAIA6,777260%

87Chickasaw County, IAIA11,66325−42%

88Palo Alto County, IAIA8,89925+56%

89Mitchell County, IAIA10,65023+44%

90O'Brien County, IAIA14,22023−53%

91Sac County, IAIA9,52519−72%

92Adams County, IAIA3,61718−51%

93Shelby County, IAIA11,68918−45%

94Wayne County, IAIA6,73816−86%

95Lyon County, IAIA12,35412−66%

96Audubon County, IAIA5,50911−73%

97Hamilton County, IAIA14,94410−69%

98Floyd County, IAIA14,9016−90%

99Osceola County, IAIA5,9806–

SHOWING 1–99 OF 99

Download CSV (full list, 99 rows)

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