RANKING · 2020 CENSUS · 38 SHOWN OF 38

Highest Iranian population share, Illinois counties · 2020

Illinois counties ranked by the share of all residents who are Iranian ancestry (2023 American Community Survey). A concentration measure: Iranian residents as a percentage of total population. This list covers the 38 counties in Illinois that qualify, ranked against each other statewide.

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RELATEDLargest American population Highest American population share Largest Arab population Highest Arab population share Largest Egyptian population Highest Egyptian population share

YEAR2010 2020 2024

Highest Iranian population share by state

RANKPLACESTATEPOPIRANIAN SHAREVS 2000

01DuPage County, ILIL934,2980.2%–

02Richland County, ILIL15,2190.2%–

03Champaign County, ILIL209,9720.1%–

04Lake County, ILIL719,3390.1%–

05Cook County, ILIL5,194,6250.1%–

06Coles County, ILIL46,6070.1%–

07Washington County, ILIL13,5640.1%–

08Edwards County, ILIL5,8980.1%–

09Jackson County, ILIL52,5010.1%–

10Wayne County, ILIL15,8820.1%–

11Whiteside County, ILIL54,1210.1%–

12Kane County, ILIL525,7570.1%–

13McDonough County, ILIL25,9160.1%–

14Madison County, ILIL263,1100.0%–

15Winnebago County, ILIL283,6740.0%–

16Will County, ILIL712,2530.0%–

17Peoria County, ILIL178,5530.0%–

18McLean County, ILIL171,4190.0%–

19Tazewell County, ILIL130,0490.0%–

20Henry County, ILIL48,0950.0%–

21Knox County, ILIL47,7670.0%–

22Sangamon County, ILIL194,1700.0%–

23Morgan County, ILIL32,5150.0%–

24Shelby County, ILIL20,5760.0%–

25Jersey County, ILIL21,1600.0%–

26McHenry County, ILIL317,7510.0%–

27Kendall County, ILIL145,4700.0%–

28Effingham County, ILIL34,5190.0%–

29Stephenson County, ILIL43,2200.0%–

30St. Clair County, ILIL250,7080.0%–

31Williamson County, ILIL67,2250.0%–

32Rock Island County, ILIL141,8690.0%–

33Crawford County, ILIL18,6480.0%–

34Christian County, ILIL33,4430.0%–

35Adams County, ILIL64,2670.0%–

36DeKalb County, ILIL101,8350.0%–

37LaSalle County, ILIL107,7730.0%–

38Marion County, ILIL36,3820.0%–

SHOWING 1–38 OF 38

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