RANKING · 2020 CENSUS · 99 SHOWN OF 99

Highest Welsh population share, Iowa counties · 2020

Iowa counties ranked by the share of all residents who are Welsh ancestry (2023 American Community Survey). A concentration measure: Welsh residents as a percentage of total population. This list covers the 99 counties in Iowa that qualify, ranked against each other statewide.

IowaAll states All rankings

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 SHAREVS 2000

01Keokuk County, IAIA9,7973.0%–

02Louisa County, IAIA10,4161.8%–

03Madison County, IAIA17,2701.6%–

04Iowa County, IAIA16,5041.6%–

05Monroe County, IAIA7,4061.5%–

06Mahaska County, IAIA21,8801.4%–

07Fremont County, IAIA6,5221.3%–

08Marion County, IAIA34,1921.2%–

09Union County, IAIA11,8291.1%–

10Cass County, IAIA12,9601.0%–

11Jasper County, IAIA38,1531.0%–

12Washington County, IAIA22,6671.0%–

13Lucas County, IAIA8,8471.0%–

14Decatur County, IAIA7,6550.9%–

15Cherokee County, IAIA11,3690.9%–

16Henry County, IAIA19,3490.9%–

17Dallas County, IAIA118,4570.9%–

18Polk County, IAIA516,5460.8%–

19Johnson County, IAIA160,0440.8%–

20Davis County, IAIA9,2300.8%–

21Appanoose County, IAIA12,0770.7%–

22Montgomery County, IAIA10,0020.7%–

23Marshall County, IAIA39,8900.7%–

24Cerro Gordo County, IAIA42,3720.7%–

25Jackson County, IAIA19,2880.7%–

26Adair County, IAIA7,4030.7%–

27Muscatine County, IAIA41,8530.7%–

28Winnebago County, IAIA10,2510.7%–

29Calhoun County, IAIA9,5620.7%–

30Guthrie County, IAIA10,7820.7%–

31Page County, IAIA14,8560.7%–

32Ringgold County, IAIA4,6420.7%–

33Warren County, IAIA57,3310.7%–

34Des Moines County, IAIA38,0770.7%–

35Buena Vista County, IAIA20,4490.6%–

36Linn County, IAIA232,0280.6%–

37Delaware County, IAIA17,6740.6%–

38Story County, IAIA101,2910.6%–

39Worth County, IAIA7,3380.6%–

40Buchanan County, IAIA20,8830.6%–

41Cedar County, IAIA18,3590.6%–

42Emmet County, IAIA9,1070.6%–

43Jones County, IAIA21,2530.6%–

44Winneshiek County, IAIA19,7330.6%–

45Wapello County, IAIA35,2100.6%–

46Clinton County, IAIA46,0020.6%–

47Fayette County, IAIA19,0470.6%–

48Mills County, IAIA14,7930.5%–

49Greene County, IAIA8,6580.5%–

50Hardin County, IAIA16,4550.5%–

51Black Hawk County, IAIA131,5320.5%–

52Pocahontas County, IAIA6,8190.5%–

53Wright County, IAIA12,8010.5%–

54Clay County, IAIA16,2020.5%–

55Clarke County, IAIA9,5740.5%–

56Dickinson County, IAIA18,0770.5%–

57Taylor County, IAIA5,8350.5%–

58Adams County, IAIA3,6170.5%–

59Van Buren County, IAIA7,1310.5%–

60Tama County, IAIA16,7960.5%–

61Grundy County, IAIA12,3610.5%–

62Howard County, IAIA9,4150.5%–

63Scott County, IAIA175,2590.5%–

64Pottawattamie County, IAIA92,9960.4%–

65Allamakee County, IAIA14,2380.4%–

66Dubuque County, IAIA99,3810.4%–

67Boone County, IAIA26,7990.4%–

68Webster County, IAIA36,8380.4%–

69Franklin County, IAIA9,8680.4%–

70Plymouth County, IAIA25,6970.4%–

71Woodbury County, IAIA106,6490.4%–

72Monona County, IAIA8,5390.4%–

73Ida County, IAIA6,7770.4%–

74Humboldt County, IAIA9,4090.4%–

75Jefferson County, IAIA15,2910.4%–

76Harrison County, IAIA14,6230.4%–

77Lee County, IAIA32,3060.4%–

78Benton County, IAIA26,0040.4%–

79Poweshiek County, IAIA18,3680.3%–

80Clayton County, IAIA16,8450.3%–

81Palo Alto County, IAIA8,8990.3%–

82Kossuth County, IAIA14,3220.3%–

83Bremer County, IAIA25,2960.3%–

84Hancock County, IAIA10,5280.3%–

85Wayne County, IAIA6,7380.2%–

86Mitchell County, IAIA10,6500.2%–

87Crawford County, IAIA16,2370.2%–

88Chickasaw County, IAIA11,6630.2%–

89Butler County, IAIA14,0490.2%–

90Audubon County, IAIA5,5090.2%–

91Sac County, IAIA9,5250.2%–

92O'Brien County, IAIA14,2200.2%–

93Shelby County, IAIA11,6890.2%–

94Carroll County, IAIA20,3030.1%–

95Sioux County, IAIA36,7740.1%–

96Lyon County, IAIA12,3540.1%–

97Osceola County, IAIA5,9800.1%–

98Hamilton County, IAIA14,9440.1%–

99Floyd County, IAIA14,9010.0%–

SHOWING 1–99 OF 99

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UPDATED 2026-06-06 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES