RANKING · 2020 CENSUS · 98 SHOWN OF 98

Largest British population, Iowa counties · 2020

Iowa counties ranked by the number of residents who are British 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 98 counties in Iowa that qualify, ranked against each other statewide.

British 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

RANKPLACESTATEPOPBRITISH POPULATIONVS 2010

01Polk County, IAIA516,5462,842+101%

02Linn County, IAIA232,0281,587+116%

03Scott County, IAIA175,2591,181+164%

04Johnson County, IAIA160,0441,058+63%

05Story County, IAIA101,291800+88%

06Dallas County, IAIA118,457748+237%

07Woodbury County, IAIA106,649519+276%

08Black Hawk County, IAIA131,532507+125%

09Warren County, IAIA57,331374+267%

10Dubuque County, IAIA99,381337+221%

11Wapello County, IAIA35,210329+868%

12Muscatine County, IAIA41,853306+580%

13Marion County, IAIA34,192299+145%

14Jefferson County, IAIA15,291272+325%

15Pottawattamie County, IAIA92,996247+1%

16Boone County, IAIA26,799207+172%

17Des Moines County, IAIA38,077179+99%

18Lee County, IAIA32,306172+129%

19Marshall County, IAIA39,890170+16%

20Clinton County, IAIA46,002159+342%

21Sioux County, IAIA36,774134+148%

22Benton County, IAIA26,004130+110%

23Poweshiek County, IAIA18,368127+102%

24Madison County, IAIA17,270118+55%

25Union County, IAIA11,829110+293%

26Cerro Gordo County, IAIA42,372106+147%

27Hamilton County, IAIA14,944102+65%

28Webster County, IAIA36,838100+400%

29Jasper County, IAIA38,15395+102%

30Washington County, IAIA22,66791−50%

31Bremer County, IAIA25,29687+235%

32Wright County, IAIA12,80186+65%

33Winneshiek County, IAIA19,73384+65%

34Cedar County, IAIA18,35977+133%

35Montgomery County, IAIA10,00272+200%

36Emmet County, IAIA9,10771+3450%

37Clayton County, IAIA16,84567+1017%

38Henry County, IAIA19,34966+5%

39Mahaska County, IAIA21,88065−8%

40Jackson County, IAIA19,28862+32%

41Greene County, IAIA8,65861+103%

42Hardin County, IAIA16,45561+281%

43Tama County, IAIA16,79661+510%

44Sac County, IAIA9,52552+225%

45Cherokee County, IAIA11,36951+920%

46Iowa County, IAIA16,50451+46%

47Fayette County, IAIA19,04750−44%

48Hancock County, IAIA10,52850+733%

49Carroll County, IAIA20,30350+900%

50Winnebago County, IAIA10,25150+1567%

51Decatur County, IAIA7,65549+277%

52Keokuk County, IAIA9,79748+140%

53Harrison County, IAIA14,62347+262%

54Mills County, IAIA14,79346−25%

55Monroe County, IAIA7,40643+153%

56Clay County, IAIA16,20241+310%

57Kossuth County, IAIA14,32241+14%

58Cass County, IAIA12,96040−9%

59Plymouth County, IAIA25,69740−47%

60Butler County, IAIA14,04939+63%

61Fremont County, IAIA6,52239+39%

62Lucas County, IAIA8,84739−62%

63Dickinson County, IAIA18,07733−58%

64Davis County, IAIA9,23031–

65Taylor County, IAIA5,83530+200%

66Audubon County, IAIA5,50928+367%

67Guthrie County, IAIA10,78226+0%

68Adair County, IAIA7,40326+100%

69Calhoun County, IAIA9,56225+213%

70Wayne County, IAIA6,73825+127%

71Franklin County, IAIA9,86823+156%

72Lyon County, IAIA12,35423+283%

73Pocahontas County, IAIA6,81922−46%

74Appanoose County, IAIA12,07722–

75Grundy County, IAIA12,36120+100%

76Monona County, IAIA8,53920−50%

77Jones County, IAIA21,25319−78%

78Buchanan County, IAIA20,88317−55%

79Page County, IAIA14,85617−79%

80Chickasaw County, IAIA11,66316−27%

81Clarke County, IAIA9,57416−20%

82Delaware County, IAIA17,67415−79%

83Worth County, IAIA7,33815+88%

84Shelby County, IAIA11,68912+9%

85Floyd County, IAIA14,90110−68%

86Buena Vista County, IAIA20,44910−55%

87Ida County, IAIA6,7779+350%

88Louisa County, IAIA10,4169–

89Adams County, IAIA3,6178−27%

90Humboldt County, IAIA9,4098–

91Ringgold County, IAIA4,6427−50%

92Crawford County, IAIA16,2376−85%

93Van Buren County, IAIA7,1315−17%

94O'Brien County, IAIA14,2204+33%

95Palo Alto County, IAIA8,8994+100%

96Howard County, IAIA9,4153−77%

97Osceola County, IAIA5,9801−67%

98Mitchell County, IAIA10,6501−97%

SHOWING 1–98 OF 98

Download CSV (full list, 98 rows)

UPDATED 2026-07-15 · DATA: US CENSUS BUREAU DECENNIAL CENSUS