Ranking of Illinois Counties By Population with Australian Ancestry in 2021

Updated on April 16, 2025.

Based on the US Census ACS-5Yrs estimates, in 2021, there were 3.00K people in Illinois with Australian ancestry. Among all Illinois counties, Cook County had the highest population with Australian ancestry (1.75K), followed by Lake County (311), and DuPage County (154).

The chart and table below shows the top 10 counties with high number of people with Australian ancestry.

You can see similar information for other states and for other ancestry groups in Illinois.

Data Source: US Census Bureau.
Ranking of Illinois Counties By Population with Australian Ancestry in 2021
Cook County
Lake County
DuPage County
Kane County
DeKalb County
Peoria County
Sangamon County
St. Clair County
McLean County
Will County
Ranking of Illinois Counties By Population with Australian Ancestry in 2021
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Rank County Population
1 Cook County 1746
2 Lake County 311
3 DuPage County 154
4 Kane County 123
5 DeKalb County 95
6 Peoria County 69
7 Sangamon County 54
8 St. Clair County 39
9 McLean County 38
10 Will County 34
11 Mason County 32
12 Knox County 30
12 Tazewell County 30
13 Champaign County 26
13 Madison County 26
14 Douglas County 24
15 Christian County 23
16 Iroquois County 19
16 Vermilion County 19
17 Macon County 15
17 Rock Island County 15
18 Clinton County 12
18 Whiteside County 12
19 Moultrie County 11
20 Winnebago County 7
21 Kankakee County 5
22 Edwards County 4
22 Henry County 4
22 Kendall County 4
22 Lee County 4
23 Bureau County 3
23 Jefferson County 3
23 LaSalle County 3
23 Morgan County 3
24 Grundy County 2
24 Wabash County 2
25 Effingham County 1
25 Marshall County 1