RANKING · 2024 ACS · 20 SHOWN OF 20

Highest Costa Rican population share, Illinois counties

Illinois counties ranked by the share of all residents who are Costa Rican origin (2024 American Community Survey). A concentration measure: Costa Rican residents as a percentage of total population. This list covers the 20 counties in Illinois that qualify, ranked against each other statewide.

Costa Rican 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

Highest Costa Rican population share by state

RANKPLACESTATEPOPCOSTA RICAN SHAREVS 2010

01Ford County, ILIL13,2160.1%–

02Marion County, ILIL36,3820.1%–

03Carroll County, ILIL15,4190.1%–

04Champaign County, ILIL209,9720.1%+0.1 pts

05Macoupin County, ILIL43,7480.1%+0.1 pts

06St. Clair County, ILIL250,7080.1%+0.0 pts

07Peoria County, ILIL178,5530.0%+0.0 pts

08Cook County, ILIL5,194,6250.0%+0.0 pts

09Will County, ILIL712,2530.0%+0.0 pts

10Livingston County, ILIL35,0570.0%–

11LaSalle County, ILIL107,7730.0%+0.0 pts

12Kendall County, ILIL145,4700.0%–

13Randolph County, ILIL29,9210.0%+0.0 pts

14Kankakee County, ILIL105,5250.0%−0.1 pts

15Kane County, ILIL525,7570.0%+0.0 pts

16DeKalb County, ILIL101,8350.0%–

17McHenry County, ILIL317,7510.0%–

18DuPage County, ILIL934,2980.0%+0.0 pts

19Lake County, ILIL719,3390.0%−0.0 pts

20Winnebago County, ILIL283,6740.0%−0.0 pts

SHOWING 1–20 OF 20

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UPDATED 2026-08-08 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES