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 (2020 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. The median across all 98 is 0.3%.

British Americans: full group profile →

IowaAll states All rankings

SAME RANKING BYCities States Metros

YEAR2010 2020 2024

RANKPLACESTATEPOPBRITISH SHAREVS 2010

01Jefferson County, IAIA15,2911.5%+1.1 pts

02Wapello County, IAIA35,2100.9%+0.8 pts

03Marion County, IAIA34,1920.9%+0.5 pts

04Union County, IAIA11,8290.9%+0.7 pts

05Dallas County, IAIA118,4570.8%+0.5 pts

06Story County, IAIA101,2910.8%+0.3 pts

07Boone County, IAIA26,7990.8%+0.5 pts

08Emmet County, IAIA9,1070.8%+0.7 pts

09Warren County, IAIA57,3310.7%+0.5 pts

10Madison County, IAIA17,2700.7%+0.2 pts

11Montgomery County, IAIA10,0020.7%+0.5 pts

12Muscatine County, IAIA41,8530.7%+0.6 pts

13Linn County, IAIA232,0280.7%+0.4 pts

14Johnson County, IAIA160,0440.7%+0.2 pts

15Poweshiek County, IAIA18,3680.7%+0.4 pts

16Hamilton County, IAIA14,9440.7%+0.3 pts

17Greene County, IAIA8,6580.7%+0.4 pts

18Scott County, IAIA175,2590.7%+0.4 pts

19Wright County, IAIA12,8010.7%+0.3 pts

20Decatur County, IAIA7,6550.6%+0.5 pts

21Polk County, IAIA516,5460.6%+0.2 pts

22Fremont County, IAIA6,5220.6%+0.2 pts

23Monroe County, IAIA7,4060.6%+0.3 pts

24Sac County, IAIA9,5250.5%+0.4 pts

25Benton County, IAIA26,0040.5%+0.3 pts

26Lee County, IAIA32,3060.5%+0.3 pts

27Audubon County, IAIA5,5090.5%+0.4 pts

28Woodbury County, IAIA106,6490.5%+0.4 pts

29Taylor County, IAIA5,8350.5%+0.3 pts

30Winnebago County, IAIA10,2510.5%+0.5 pts

31Keokuk County, IAIA9,7970.5%+0.3 pts

32Hancock County, IAIA10,5280.5%+0.4 pts

33Des Moines County, IAIA38,0770.5%+0.2 pts

34Lucas County, IAIA8,8470.5%−0.7 pts

35Cherokee County, IAIA11,3690.5%+0.4 pts

36Marshall County, IAIA39,8900.4%+0.1 pts

37Winneshiek County, IAIA19,7330.4%+0.2 pts

38Cedar County, IAIA18,3590.4%+0.2 pts

39Washington County, IAIA22,6670.4%−0.4 pts

40Wayne County, IAIA6,7380.4%+0.2 pts

41Black Hawk County, IAIA131,5320.4%+0.2 pts

42Sioux County, IAIA36,7740.4%+0.2 pts

43Clayton County, IAIA16,8450.4%+0.3 pts

44Adair County, IAIA7,4030.4%+0.2 pts

45Hardin County, IAIA16,4550.4%+0.3 pts

46Tama County, IAIA16,7960.4%+0.3 pts

47Bremer County, IAIA25,2960.3%+0.2 pts

48Dubuque County, IAIA99,3810.3%+0.2 pts

49Davis County, IAIA9,2300.3%–

50Clinton County, IAIA46,0020.3%+0.3 pts

51Harrison County, IAIA14,6230.3%+0.2 pts

52Henry County, IAIA19,3490.3%0.0 pts

53Pocahontas County, IAIA6,8190.3%−0.2 pts

54Jackson County, IAIA19,2880.3%+0.1 pts

55Iowa County, IAIA16,5040.3%+0.1 pts

56Cass County, IAIA12,9600.3%0.0 pts

57Mills County, IAIA14,7930.3%−0.1 pts

58Mahaska County, IAIA21,8800.3%0.0 pts

59Kossuth County, IAIA14,3220.3%0.0 pts

60Webster County, IAIA36,8380.3%+0.2 pts

61Butler County, IAIA14,0490.3%+0.1 pts

62Pottawattamie County, IAIA92,9960.3%0.0 pts

63Calhoun County, IAIA9,5620.3%+0.2 pts

64Jasper County, IAIA38,1530.3%+0.1 pts

65Fayette County, IAIA19,0470.3%−0.2 pts

66Clay County, IAIA16,2020.3%+0.2 pts

67Cerro Gordo County, IAIA42,3720.2%+0.2 pts

68Carroll County, IAIA20,3030.2%+0.2 pts

69Guthrie County, IAIA10,7820.2%0.0 pts

70Monona County, IAIA8,5390.2%−0.2 pts

71Franklin County, IAIA9,8680.2%+0.1 pts

72Adams County, IAIA3,6170.2%0.0 pts

73Worth County, IAIA7,3380.2%+0.1 pts

74Lyon County, IAIA12,3540.2%+0.1 pts

75Dickinson County, IAIA18,0770.2%−0.3 pts

76Appanoose County, IAIA12,0770.2%–

77Clarke County, IAIA9,5740.2%0.0 pts

78Grundy County, IAIA12,3610.2%+0.1 pts

79Plymouth County, IAIA25,6970.2%−0.1 pts

80Ringgold County, IAIA4,6420.1%−0.1 pts

81Chickasaw County, IAIA11,6630.1%0.0 pts

82Ida County, IAIA6,7770.1%+0.1 pts

83Page County, IAIA14,8560.1%−0.4 pts

84Shelby County, IAIA11,6890.1%0.0 pts

85Jones County, IAIA21,2530.1%−0.3 pts

86Delaware County, IAIA17,6740.1%−0.3 pts

87Humboldt County, IAIA9,4090.1%–

88Louisa County, IAIA10,4160.1%–

89Buchanan County, IAIA20,8830.1%−0.1 pts

90Van Buren County, IAIA7,1310.1%0.0 pts

91Floyd County, IAIA14,9010.1%−0.1 pts

92Buena Vista County, IAIA20,4490.1%−0.1 pts

93Palo Alto County, IAIA8,8990.0%0.0 pts

94Crawford County, IAIA16,2370.0%−0.2 pts

95Howard County, IAIA9,4150.0%−0.1 pts

96O'Brien County, IAIA14,2200.0%0.0 pts

97Osceola County, IAIA5,9800.0%0.0 pts

98Mitchell County, IAIA10,6500.0%−0.3 pts

SHOWING 1–98 OF 98

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