RANKING · 2020 CENSUS · 31 SHOWN OF 31

Highest Jamaican population share, Iowa counties · 2020

Iowa counties ranked by the share of all residents who are Jamaican ancestry (2020 American Community Survey). A concentration measure: Jamaican residents as a percentage of total population. This list covers the 31 counties in Iowa that qualify, ranked against each other statewide.

Jamaican Americans: full group profile →

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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

RANKPLACESTATEPOPJAMAICAN SHAREVS 2010

01Shelby County, IAIA11,6890.6%–

02Decatur County, IAIA7,6550.3%+0.1 pts

03Palo Alto County, IAIA8,8990.2%–

04Mahaska County, IAIA21,8800.2%–

05Emmet County, IAIA9,1070.2%+0.2 pts

06Henry County, IAIA19,3490.2%–

07Boone County, IAIA26,7990.1%−0.0 pts

08Webster County, IAIA36,8380.1%+0.1 pts

09Linn County, IAIA232,0280.1%+0.1 pts

10Union County, IAIA11,8290.1%–

11Johnson County, IAIA160,0440.1%−0.0 pts

12Sac County, IAIA9,5250.1%–

13Woodbury County, IAIA106,6490.1%+0.0 pts

14Jasper County, IAIA38,1530.1%+0.1 pts

15Dubuque County, IAIA99,3810.1%+0.0 pts

16Polk County, IAIA516,5460.1%−0.0 pts

17Black Hawk County, IAIA131,5320.0%−0.0 pts

18Montgomery County, IAIA10,0020.0%–

19Jackson County, IAIA19,2880.0%–

20Story County, IAIA101,2910.0%–

21Crawford County, IAIA16,2370.0%–

22Page County, IAIA14,8560.0%–

23Scott County, IAIA175,2590.0%+0.0 pts

24Wapello County, IAIA35,2100.0%–

25Fayette County, IAIA19,0470.0%–

26O'Brien County, IAIA14,2200.0%–

27Sioux County, IAIA36,7740.0%–

28Mills County, IAIA14,7930.0%–

29Dickinson County, IAIA18,0770.0%–

30Clayton County, IAIA16,8450.0%–

31Dallas County, IAIA118,4570.0%−0.2 pts

SHOWING 1–31 OF 31

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UPDATED 2026-08-08 · DATA: US CENSUS BUREAU DECENNIAL CENSUS