RANKING · 2024 ACS · 28 SHOWN OF 28

Highest Australian population share, Illinois counties

Illinois counties ranked by the share of all residents who are Australian ancestry (2023 American Community Survey). A concentration measure: Australian residents as a percentage of total population. This list covers the 28 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 Australian population share by state

RANKPLACESTATEPOPAUSTRALIAN SHAREVS 2000

01De Witt County, ILIL15,1180.2%–

02Christian County, ILIL33,4430.2%–

03McDonough County, ILIL25,9160.1%–

04Effingham County, ILIL34,5190.1%–

05Scott County, ILIL4,8660.1%–

06Lake County, ILIL719,3390.0%–

07DeKalb County, ILIL101,8350.0%–

08Cook County, ILIL5,194,6250.0%–

09Clark County, ILIL15,1140.0%–

10LaSalle County, ILIL107,7730.0%–

11Madison County, ILIL263,1100.0%–

12McHenry County, ILIL317,7510.0%–

13DuPage County, ILIL934,2980.0%–

14Kane County, ILIL525,7570.0%–

15McLean County, ILIL171,4190.0%–

16Williamson County, ILIL67,2250.0%–

17Iroquois County, ILIL26,1500.0%–

18Knox County, ILIL47,7670.0%–

19Kendall County, ILIL145,4700.0%–

20Sangamon County, ILIL194,1700.0%–

21Douglas County, ILIL19,8800.0%–

22Will County, ILIL712,2530.0%–

23Winnebago County, ILIL283,6740.0%–

24Rock Island County, ILIL141,8690.0%–

25Peoria County, ILIL178,5530.0%–

26Macon County, ILIL99,3000.0%–

27Grundy County, ILIL54,0520.0%–

28St. Clair County, ILIL250,7080.0%–

SHOWING 1–28 OF 28

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