RANKING · 2020 CENSUS · 16 SHOWN OF 16

Largest Costa Rican population, Illinois counties · 2020

Illinois counties ranked by the number of residents who are Costa Rican origin, from the 2020 American Community Survey detailed-origin tables. Each list covers the full eligible universe; download the complete data as CSV. This list covers the 16 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, ILIL5,194,6251,400−1%

02Kane County, ILIL525,757391+652%

03Lake County, ILIL719,339252−13%

04DuPage County, ILIL934,298217+274%

05Peoria County, ILIL178,553100+16%

06Sangamon County, ILIL194,17055–

07Boone County, ILIL53,56854–

08McLean County, ILIL171,41954–

09Woodford County, ILIL38,11149–

10Champaign County, ILIL209,97247+2%

11Will County, ILIL712,25342+223%

12Tazewell County, ILIL130,04936–

13Morgan County, ILIL32,51531+107%

14McDonough County, ILIL25,9163–

15DeKalb County, ILIL101,8352–

16Williamson County, ILIL67,2252−60%

SHOWING 1–16 OF 16

Download CSV (full list, 16 rows)

UPDATED 2026-07-15 · DATA: US CENSUS BUREAU DECENNIAL CENSUS