RANKING · 2010 CENSUS · 18 SHOWN OF 18

Highest Costa Rican population share, Illinois counties · 2010

Illinois counties ranked by the share of all residents who are Costa Rican origin (2023 American Community Survey). A concentration measure: Costa Rican residents as a percentage of total population. This list covers the 18 counties in Illinois that qualify, ranked against each other statewide.

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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 2000

01Jo Daviess County, ILIL21,5940.1%–

02Kankakee County, ILIL105,5250.1%–

03Bond County, ILIL16,9590.1%–

04Peoria County, ILIL178,5530.0%–

05Morgan County, ILIL32,5150.0%–

06Lake County, ILIL719,3390.0%–

07Winnebago County, ILIL283,6740.0%–

08Madison County, ILIL263,1100.0%–

09Macoupin County, ILIL43,7480.0%–

10Cook County, ILIL5,194,6250.0%–

11Champaign County, ILIL209,9720.0%–

12St. Clair County, ILIL250,7080.0%–

13Randolph County, ILIL29,9210.0%–

14LaSalle County, ILIL107,7730.0%–

15Kane County, ILIL525,7570.0%–

16Williamson County, ILIL67,2250.0%–

17DuPage County, ILIL934,2980.0%–

18Will County, ILIL712,2530.0%–

SHOWING 1–18 OF 18

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