RANKING · 2024 ACS · 20 SHOWN OF 20

Largest Costa Rican population, Illinois counties

Illinois counties ranked by the number of residents who are Costa Rican origin, from the 2024 American Community Survey detailed-origin tables. Each list covers the full eligible universe; download the complete data as CSV. 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

Largest Costa Rican population by state

RANKPLACESTATEPOPCOSTA RICAN POPULATIONVS 2010

01Cook County, ILIL5,194,6251,740+23%

02Will County, ILIL712,253233+1692%

03Champaign County, ILIL209,972200+335%

04St. Clair County, ILIL250,708129+135%

05DuPage County, ILIL934,298113+95%

06Peoria County, ILIL178,55384−2%

07Kane County, ILIL525,75781+56%

08Lake County, ILIL719,33980−72%

09Marion County, ILIL36,38251–

10McHenry County, ILIL317,75142–

11Macoupin County, ILIL43,74837+131%

12Kendall County, ILIL145,47031–

13LaSalle County, ILIL107,77325+92%

14Ford County, ILIL13,21620–

15Kankakee County, ILIL105,52519−80%

16Carroll County, ILIL15,41916–

17DeKalb County, ILIL101,83515–

18Livingston County, ILIL35,05711–

19Winnebago County, ILIL283,67410−92%

20Randolph County, ILIL29,9216+20%

SHOWING 1–20 OF 20

Download CSV (full list, 20 rows)

UPDATED 2026-07-15 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES