RANKING · 2020 CENSUS · 98 SHOWN OF 98

Highest British population share, Iowa counties · 2020

Iowa counties ranked by the share of all residents who are British ancestry (2023 American Community Survey). A concentration measure: British residents as a percentage of total population. This list covers the 98 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

RANKPLACESTATEPOPBRITISH SHAREVS 2000

01Jefferson County, IAIA15,2911.5%–

02Wapello County, IAIA35,2100.9%–

03Marion County, IAIA34,1920.9%–

04Union County, IAIA11,8290.9%–

05Dallas County, IAIA118,4570.8%–

06Story County, IAIA101,2910.8%–

07Boone County, IAIA26,7990.8%–

08Emmet County, IAIA9,1070.8%–

09Warren County, IAIA57,3310.7%–

10Madison County, IAIA17,2700.7%–

11Montgomery County, IAIA10,0020.7%–

12Muscatine County, IAIA41,8530.7%–

13Linn County, IAIA232,0280.7%–

14Johnson County, IAIA160,0440.7%–

15Poweshiek County, IAIA18,3680.7%–

16Hamilton County, IAIA14,9440.7%–

17Greene County, IAIA8,6580.7%–

18Scott County, IAIA175,2590.7%–

19Wright County, IAIA12,8010.7%–

20Decatur County, IAIA7,6550.6%–

21Polk County, IAIA516,5460.6%–

22Fremont County, IAIA6,5220.6%–

23Monroe County, IAIA7,4060.6%–

24Sac County, IAIA9,5250.5%–

25Benton County, IAIA26,0040.5%–

26Lee County, IAIA32,3060.5%–

27Audubon County, IAIA5,5090.5%–

28Woodbury County, IAIA106,6490.5%–

29Taylor County, IAIA5,8350.5%–

30Winnebago County, IAIA10,2510.5%–

31Keokuk County, IAIA9,7970.5%–

32Hancock County, IAIA10,5280.5%–

33Des Moines County, IAIA38,0770.5%–

34Lucas County, IAIA8,8470.5%–

35Cherokee County, IAIA11,3690.5%–

36Marshall County, IAIA39,8900.4%–

37Winneshiek County, IAIA19,7330.4%–

38Cedar County, IAIA18,3590.4%–

39Washington County, IAIA22,6670.4%–

40Wayne County, IAIA6,7380.4%–

41Black Hawk County, IAIA131,5320.4%–

42Sioux County, IAIA36,7740.4%–

43Clayton County, IAIA16,8450.4%–

44Adair County, IAIA7,4030.4%–

45Hardin County, IAIA16,4550.4%–

46Tama County, IAIA16,7960.4%–

47Bremer County, IAIA25,2960.3%–

48Dubuque County, IAIA99,3810.3%–

49Davis County, IAIA9,2300.3%–

50Clinton County, IAIA46,0020.3%–

51Harrison County, IAIA14,6230.3%–

52Henry County, IAIA19,3490.3%–

53Pocahontas County, IAIA6,8190.3%–

54Jackson County, IAIA19,2880.3%–

55Iowa County, IAIA16,5040.3%–

56Cass County, IAIA12,9600.3%–

57Mills County, IAIA14,7930.3%–

58Mahaska County, IAIA21,8800.3%–

59Kossuth County, IAIA14,3220.3%–

60Webster County, IAIA36,8380.3%–

61Butler County, IAIA14,0490.3%–

62Pottawattamie County, IAIA92,9960.3%–

63Calhoun County, IAIA9,5620.3%–

64Jasper County, IAIA38,1530.3%–

65Fayette County, IAIA19,0470.3%–

66Clay County, IAIA16,2020.3%–

67Cerro Gordo County, IAIA42,3720.2%–

68Carroll County, IAIA20,3030.2%–

69Guthrie County, IAIA10,7820.2%–

70Monona County, IAIA8,5390.2%–

71Franklin County, IAIA9,8680.2%–

72Adams County, IAIA3,6170.2%–

73Worth County, IAIA7,3380.2%–

74Lyon County, IAIA12,3540.2%–

75Dickinson County, IAIA18,0770.2%–

76Appanoose County, IAIA12,0770.2%–

77Clarke County, IAIA9,5740.2%–

78Grundy County, IAIA12,3610.2%–

79Plymouth County, IAIA25,6970.2%–

80Ringgold County, IAIA4,6420.1%–

81Chickasaw County, IAIA11,6630.1%–

82Ida County, IAIA6,7770.1%–

83Page County, IAIA14,8560.1%–

84Shelby County, IAIA11,6890.1%–

85Jones County, IAIA21,2530.1%–

86Delaware County, IAIA17,6740.1%–

87Humboldt County, IAIA9,4090.1%–

88Louisa County, IAIA10,4160.1%–

89Buchanan County, IAIA20,8830.1%–

90Van Buren County, IAIA7,1310.1%–

91Floyd County, IAIA14,9010.1%–

92Buena Vista County, IAIA20,4490.1%–

93Palo Alto County, IAIA8,8990.0%–

94Crawford County, IAIA16,2370.0%–

95Howard County, IAIA9,4150.0%–

96O'Brien County, IAIA14,2200.0%–

97Osceola County, IAIA5,9800.0%–

98Mitchell County, IAIA10,6500.0%–

SHOWING 1–98 OF 98

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