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 (2023 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.

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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

01Woodford County, ILIL38,1110.1%–

02Boone County, ILIL53,5680.1%–

03Morgan County, ILIL32,5150.1%–

04Kane County, ILIL525,7570.1%–

05Peoria County, ILIL178,5530.1%–

06Lake County, ILIL719,3390.0%–

07McLean County, ILIL171,4190.0%–

08Sangamon County, ILIL194,1700.0%–

09Tazewell County, ILIL130,0490.0%–

10Cook County, ILIL5,194,6250.0%–

11DuPage County, ILIL934,2980.0%–

12Champaign County, ILIL209,9720.0%–

13McDonough County, ILIL25,9160.0%–

14Will County, ILIL712,2530.0%–

15Williamson County, ILIL67,2250.0%–

16DeKalb County, ILIL101,8350.0%–

SHOWING 1–16 OF 16

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