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 (2023 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.

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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 2000

01Shelby County, IAIA11,6890.6%–

02Decatur County, IAIA7,6550.3%–

03Palo Alto County, IAIA8,8990.2%–

04Mahaska County, IAIA21,8800.2%–

05Emmet County, IAIA9,1070.2%–

06Henry County, IAIA19,3490.2%–

07Boone County, IAIA26,7990.1%–

08Webster County, IAIA36,8380.1%–

09Linn County, IAIA232,0280.1%–

10Union County, IAIA11,8290.1%–

11Johnson County, IAIA160,0440.1%–

12Sac County, IAIA9,5250.1%–

13Woodbury County, IAIA106,6490.1%–

14Jasper County, IAIA38,1530.1%–

15Dubuque County, IAIA99,3810.1%–

16Polk County, IAIA516,5460.1%–

17Black Hawk County, IAIA131,5320.0%–

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%–

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%–

SHOWING 1–31 OF 31

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