RANKING · 2020 CENSUS · 16 SHOWN OF 16

Highest Costa Rican population share, Illinois counties · 2020

Illinois counties ranked by the share of all residents who are Costa Rican origin (2020 American Community Survey). A concentration measure: Costa Rican residents as a percentage of total population. This list covers the 16 counties in Illinois that qualify, ranked against each other statewide. The median across all 16 is 0.0%.

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

01Woodford County, ILIL38,1110.1%–

02Boone County, ILIL53,5680.1%–

03Morgan County, ILIL32,5150.1%0.0 pts

04Kane County, ILIL525,7570.1%+0.1 pts

05Peoria County, ILIL178,5530.1%0.0 pts

06Lake County, ILIL719,3390.0%0.0 pts

07McLean County, ILIL171,4190.0%–

08Sangamon County, ILIL194,1700.0%–

09Tazewell County, ILIL130,0490.0%–

10Cook County, ILIL5,194,6250.0%0.0 pts

11DuPage County, ILIL934,2980.0%0.0 pts

12Champaign County, ILIL209,9720.0%0.0 pts

13McDonough County, ILIL25,9160.0%–

14Will County, ILIL712,2530.0%0.0 pts

15Williamson County, ILIL67,2250.0%0.0 pts

16DeKalb County, ILIL101,8350.0%–

SHOWING 1–16 OF 16

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UPDATED 2026-09-11 · DATA: US CENSUS BUREAU DECENNIAL CENSUS