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 (2024 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. The median across all 37 is 0.0%. Biggest climber in the top 100 since 2020: Jasper County, IA, up 24 places to #11.

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SAME RANKING BYCities States Metros

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

RANKPLACESTATEPOPJAPANESE SHAREVS 2020

01▲1Mahaska County, IAIA21,8800.4%0.0 pts

02Wright County, IAIA12,8010.4%–

03Cherokee County, IAIA11,3690.3%–

04Worth County, IAIA7,3380.2%–

05▲10Winneshiek County, IAIA19,7330.1%+0.1 pts

06▲1Johnson County, IAIA160,0440.1%−0.1 pts

07Pocahontas County, IAIA6,8190.1%–

08▼3Poweshiek County, IAIA18,3680.1%−0.2 pts

09Bremer County, IAIA25,2960.1%–

10▲12Story County, IAIA101,2910.1%0.0 pts

11▲24Jasper County, IAIA38,1530.1%+0.1 pts

12▲8Buena Vista County, IAIA20,4490.1%0.0 pts

13▼1Adair County, IAIA7,4030.1%0.0 pts

14▲11Clinton County, IAIA46,0020.1%0.0 pts

15Decatur County, IAIA7,6550.1%–

16▲12Woodbury County, IAIA106,6490.0%0.0 pts

17▲15Pottawattamie County, IAIA92,9960.0%0.0 pts

18▼2Black Hawk County, IAIA131,5320.0%0.0 pts

19▲5Scott County, IAIA175,2590.0%0.0 pts

20Henry County, IAIA19,3490.0%–

21▲10Sioux County, IAIA36,7740.0%0.0 pts

22Marion County, IAIA34,1920.0%–

23▼9Polk County, IAIA516,5460.0%0.0 pts

24Butler County, IAIA14,0490.0%–

25Mills County, IAIA14,7930.0%–

26Mitchell County, IAIA10,6500.0%–

27▼8Linn County, IAIA232,0280.0%0.0 pts

28▼1Wapello County, IAIA35,2100.0%0.0 pts

29Clarke County, IAIA9,5740.0%–

30Hamilton County, IAIA14,9440.0%–

31▼8Dubuque County, IAIA99,3810.0%0.0 pts

32Allamakee County, IAIA14,2380.0%–

33▼32O'Brien County, IAIA14,2200.0%−0.4 pts

34▼21Webster County, IAIA36,8380.0%−0.1 pts

35Grundy County, IAIA12,3610.0%–

36▼3Hardin County, IAIA16,4550.0%0.0 pts

37▼8Dallas County, IAIA118,4570.0%0.0 pts

SHOWING 1–37 OF 37

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UPDATED 2026-09-11 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES