RANKING · 2020 CENSUS · 33 SHOWN OF 33

Highest Brazilian population share, Illinois counties · 2020

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

Brazilian Americans: full group profile →

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RELATEDLargest American population Highest American population share Largest Arab population Highest Arab population share Largest Egyptian population Highest Egyptian population share

YEAR2010 2020 2024

Highest Brazilian population share by state

RANKPLACESTATEPOPBRAZILIAN SHAREVS 2010

01Boone County, ILIL53,5680.6%+1619%

02Piatt County, ILIL16,7910.2%–

03Menard County, ILIL11,8630.2%–

04Champaign County, ILIL209,9720.1%−46%

05Kane County, ILIL525,7570.1%+43%

06Lake County, ILIL719,3390.1%+77%

07Cook County, ILIL5,194,6250.1%+41%

08DeKalb County, ILIL101,8350.1%–

09McLean County, ILIL171,4190.1%+667%

10McHenry County, ILIL317,7510.1%−22%

11Peoria County, ILIL178,5530.1%−32%

12Jackson County, ILIL52,5010.1%–

13Lee County, ILIL32,9140.0%–

14Crawford County, ILIL18,6480.0%–

15Bureau County, ILIL32,5100.0%–

16Mercer County, ILIL15,2290.0%–

17DuPage County, ILIL934,2980.0%−62%

18Winnebago County, ILIL283,6740.0%+278%

19Calhoun County, ILIL4,3000.0%−57%

20Fulton County, ILIL32,9010.0%–

21Will County, ILIL712,2530.0%−10%

22Franklin County, ILIL36,9160.0%–

23Adams County, ILIL64,2670.0%+308%

24Hancock County, ILIL16,8030.0%–

25McDonough County, ILIL25,9160.0%–

26Sangamon County, ILIL194,1700.0%+162%

27Rock Island County, ILIL141,8690.0%+0%

28Kendall County, ILIL145,4700.0%+167%

29Madison County, ILIL263,1100.0%−37%

30Macon County, ILIL99,3000.0%+102%

31St. Clair County, ILIL250,7080.0%+125%

32LaSalle County, ILIL107,7730.0%−40%

33Williamson County, ILIL67,2250.0%–

SHOWING 1–33 OF 33

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UPDATED 2026-07-05 · DATA: US CENSUS BUREAU DECENNIAL CENSUS