RANKING · 2020 CENSUS · 33 SHOWN OF 33

Highest Dominican population share, Illinois counties · 2020

Illinois counties ranked by the share of all residents who are Dominican origin (2020 American Community Survey). A concentration measure: Dominican residents as a percentage of total population. This list covers the 33 counties in Illinois that qualify, ranked against each other statewide.

Dominican Americans: full group profile →

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RELATEDLargest Mexican population Highest Mexican population share Largest Puerto Rican population Highest Puerto Rican population share Largest Cuban population Highest Cuban population share

YEAR2010 2020 2024

RANKPLACESTATEPOPDOMINICAN SHAREVS 2010

01Cass County, ILIL12,4630.6%+0.3 pts

02Edwards County, ILIL5,8980.2%–

03Ford County, ILIL13,2160.1%+0.0 pts

04Brown County, ILIL6,4010.1%–

05Calhoun County, ILIL4,3000.1%–

06Lawrence County, ILIL13,7900.1%–

07Cook County, ILIL5,194,6250.1%+0.0 pts

08Lake County, ILIL719,3390.1%+0.0 pts

09Kankakee County, ILIL105,5250.1%–

10McHenry County, ILIL317,7510.1%+0.0 pts

11McLean County, ILIL171,4190.1%+0.0 pts

12DuPage County, ILIL934,2980.1%+0.0 pts

13Lee County, ILIL32,9140.1%+0.1 pts

14Will County, ILIL712,2530.1%+0.0 pts

15Kane County, ILIL525,7570.1%+0.0 pts

16Adams County, ILIL64,2670.1%–

17Randolph County, ILIL29,9210.0%–

18Jackson County, ILIL52,5010.0%−0.0 pts

19Knox County, ILIL47,7670.0%–

20LaSalle County, ILIL107,7730.0%–

21Champaign County, ILIL209,9720.0%+0.0 pts

22Tazewell County, ILIL130,0490.0%–

23Franklin County, ILIL36,9160.0%–

24St. Clair County, ILIL250,7080.0%+0.0 pts

25Richland County, ILIL15,2190.0%–

26Macoupin County, ILIL43,7480.0%–

27Jersey County, ILIL21,1600.0%–

28Effingham County, ILIL34,5190.0%–

29Kendall County, ILIL145,4700.0%–

30Sangamon County, ILIL194,1700.0%–

31Macon County, ILIL99,3000.0%−0.0 pts

32Winnebago County, ILIL283,6740.0%−0.0 pts

33Rock Island County, ILIL141,8690.0%–

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