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. The median across all 20 is 0.0%. Biggest climber in the top 100 since 2020: Champaign County, IL, up 8 places to #4.

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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%–

04▲8Champaign County, ILIL209,9720.1%+0.1 pts

05Macoupin County, ILIL43,7480.1%+0.1 pts

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

07▼2Peoria County, ILIL178,5530.0%0.0 pts

08▲2Cook County, ILIL5,194,6250.0%0.0 pts

09▲5Will 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

15▼11Kane County, ILIL525,7570.0%0.0 pts

16DeKalb County, ILIL101,8350.0%–

17McHenry County, ILIL317,7510.0%–

18▼7DuPage County, ILIL934,2980.0%0.0 pts

19▼13Lake County, ILIL719,3390.0%0.0 pts

20Winnebago County, ILIL283,6740.0%0.0 pts

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UPDATED 2026-09-11 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES