RANKING · 2010 CENSUS · 98 SHOWN OF 98

Highest Welsh population share, Iowa counties · 2010

Iowa counties ranked by the share of all residents who are Welsh ancestry (2010 American Community Survey). A concentration measure: Welsh residents as a percentage of total population. This list covers the 98 counties in Iowa that qualify, ranked against each other statewide. The median across all 98 is 0.6%.

Welsh Americans: full group profile →

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 –

01Decatur County, IAIA7,6552.3%–

02Montgomery County, IAIA10,0022.2%–

03Boone County, IAIA26,7991.9%–

04Louisa County, IAIA10,4161.9%–

05Wayne County, IAIA6,7381.8%–

06Clay County, IAIA16,2021.7%–

07Madison County, IAIA17,2701.6%–

08Wapello County, IAIA35,2101.5%–

09Monroe County, IAIA7,4061.5%–

10Iowa County, IAIA16,5041.4%–

11Union County, IAIA11,8291.4%–

12Guthrie County, IAIA10,7821.4%–

13Jasper County, IAIA38,1531.4%–

14Keokuk County, IAIA9,7971.2%–

15Appanoose County, IAIA12,0771.2%–

16Henry County, IAIA19,3491.1%–

17Pottawattamie County, IAIA92,9961.1%–

18Washington County, IAIA22,6671.1%–

19Cedar County, IAIA18,3591.1%–

20Benton County, IAIA26,0041.0%–

21Mahaska County, IAIA21,8801.0%–

22Dallas County, IAIA118,4571.0%–

23Clayton County, IAIA16,8451.0%–

24Marion County, IAIA34,1920.9%–

25Howard County, IAIA9,4150.9%–

26Warren County, IAIA57,3310.9%–

27Polk County, IAIA516,5460.9%–

28Mills County, IAIA14,7930.9%–

29Story County, IAIA101,2910.9%–

30Adams County, IAIA3,6170.9%–

31Linn County, IAIA232,0280.9%–

32Jackson County, IAIA19,2880.9%–

33Harrison County, IAIA14,6230.9%–

34Clinton County, IAIA46,0020.9%–

35Johnson County, IAIA160,0440.8%–

36Wright County, IAIA12,8010.8%–

37Clarke County, IAIA9,5740.8%–

38Des Moines County, IAIA38,0770.8%–

39Page County, IAIA14,8560.7%–

40Delaware County, IAIA17,6740.7%–

41Van Buren County, IAIA7,1310.7%–

42Audubon County, IAIA5,5090.7%–

43Marshall County, IAIA39,8900.7%–

44Pocahontas County, IAIA6,8190.7%–

45Muscatine County, IAIA41,8530.6%–

46Cass County, IAIA12,9600.6%–

47Sac County, IAIA9,5250.6%–

48Winnebago County, IAIA10,2510.6%–

49Cerro Gordo County, IAIA42,3720.6%–

50Lucas County, IAIA8,8470.6%–

51Grundy County, IAIA12,3610.6%–

52Buchanan County, IAIA20,8830.5%–

53Fremont County, IAIA6,5220.5%–

54Davis County, IAIA9,2300.5%–

55Scott County, IAIA175,2590.5%–

56Black Hawk County, IAIA131,5320.5%–

57Greene County, IAIA8,6580.5%–

58Tama County, IAIA16,7960.5%–

59Plymouth County, IAIA25,6970.5%–

60Cherokee County, IAIA11,3690.5%–

61Jefferson County, IAIA15,2910.5%–

62Franklin County, IAIA9,8680.5%–

63Hardin County, IAIA16,4550.5%–

64Carroll County, IAIA20,3030.5%–

65Emmet County, IAIA9,1070.5%–

66Buena Vista County, IAIA20,4490.4%–

67Poweshiek County, IAIA18,3680.4%–

68Dickinson County, IAIA18,0770.4%–

69Webster County, IAIA36,8380.4%–

70Ringgold County, IAIA4,6420.4%–

71Butler County, IAIA14,0490.4%–

72Dubuque County, IAIA99,3810.4%–

73Worth County, IAIA7,3380.4%–

74Taylor County, IAIA5,8350.4%–

75Fayette County, IAIA19,0470.4%–

76Monona County, IAIA8,5390.4%–

77Ida County, IAIA6,7770.4%–

78Jones County, IAIA21,2530.4%–

79Bremer County, IAIA25,2960.4%–

80Floyd County, IAIA14,9010.4%–

81Chickasaw County, IAIA11,6630.3%–

82O'Brien County, IAIA14,2200.3%–

83Woodbury County, IAIA106,6490.3%–

84Lee County, IAIA32,3060.3%–

85Winneshiek County, IAIA19,7330.3%–

86Lyon County, IAIA12,3540.3%–

87Hancock County, IAIA10,5280.3%–

88Crawford County, IAIA16,2370.3%–

89Shelby County, IAIA11,6890.3%–

90Adair County, IAIA7,4030.3%–

91Calhoun County, IAIA9,5620.2%–

92Kossuth County, IAIA14,3220.2%–

93Hamilton County, IAIA14,9440.2%–

94Humboldt County, IAIA9,4090.2%–

95Palo Alto County, IAIA8,8990.2%–

96Mitchell County, IAIA10,6500.1%–

97Allamakee County, IAIA14,2380.1%–

98Sioux County, IAIA36,7740.0%–

SHOWING 1–98 OF 98

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