RANKING · 2024 ACS · 37 SHOWN OF 37

Highest Japanese population share, Iowa counties

Iowa counties ranked by the share of all residents who are Japanese (2023 American Community Survey). A concentration measure: Japanese residents as a percentage of total population. This list covers the 37 counties in Iowa that qualify, ranked against each other statewide.

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RELATEDLargest Chinese population Highest Chinese population share Largest Taiwanese population Highest Taiwanese population share Largest Hmong population Highest Hmong population share

RANKPLACESTATEPOPJAPANESE SHAREVS 2000

01Mahaska County, IAIA21,8800.4%–

02Wright County, IAIA12,8010.4%–

03Cherokee County, IAIA11,3690.3%–

04Worth County, IAIA7,3380.2%–

05Winneshiek County, IAIA19,7330.1%–

06Johnson County, IAIA160,0440.1%–

07Pocahontas County, IAIA6,8190.1%–

08Poweshiek County, IAIA18,3680.1%–

09Bremer County, IAIA25,2960.1%–

10Story County, IAIA101,2910.1%–

11Jasper County, IAIA38,1530.1%–

12Buena Vista County, IAIA20,4490.1%–

13Adair County, IAIA7,4030.1%–

14Clinton County, IAIA46,0020.1%–

15Decatur County, IAIA7,6550.1%–

16Woodbury County, IAIA106,6490.0%–

17Pottawattamie County, IAIA92,9960.0%–

18Black Hawk County, IAIA131,5320.0%–

19Scott County, IAIA175,2590.0%–

20Henry County, IAIA19,3490.0%–

21Sioux County, IAIA36,7740.0%–

22Marion County, IAIA34,1920.0%–

23Polk County, IAIA516,5460.0%–

24Butler County, IAIA14,0490.0%–

25Mills County, IAIA14,7930.0%–

26Mitchell County, IAIA10,6500.0%–

27Linn County, IAIA232,0280.0%–

28Wapello County, IAIA35,2100.0%–

29Clarke County, IAIA9,5740.0%–

30Hamilton County, IAIA14,9440.0%–

31Dubuque County, IAIA99,3810.0%–

32Allamakee County, IAIA14,2380.0%–

33O'Brien County, IAIA14,2200.0%–

34Webster County, IAIA36,8380.0%–

35Grundy County, IAIA12,3610.0%–

36Hardin County, IAIA16,4550.0%–

37Dallas County, IAIA118,4570.0%–

SHOWING 1–37 OF 37

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