O'Fallon city, IL Foreign-Born Population By Country of Birth in 2021 (ACS-5Yrs)

Updated on November 5, 2025.

Based on the US Census ACS-5Yrs estimates, in 2021, the Foreign-Born population of O'Fallon city, IL was 1,495, which was 4.68% of the population of O'Fallon city, IL.

The highest percentage of the O'Fallon city foreign-born population were born in Philippines (17.26%), followed by India (13.18%), and Korea (6.02%).

The chart below shows the top 10 place of birth countries for the O'Fallon city Foreign-born population as a percentage of the total O'Fallon city foreign-born population. The table below shows the population and percentage of the O'Fallon city foreign-born population for many different place of birth countries.

You can see similar information for other Illinois cities and places and for Illinois.

Data Source: US Census Bureau.
O'Fallon city, IL Percentage of Foreign-Born Population By Country of Birth in 2021
Philippines
India
Korea
Mexico
Germany
Egypt
Kuwait
Jordan
Thailand
China
O'Fallon city, IL Foreign-Born Population By Country of Birth in 2021 (ACS-5Yrs)
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Country of Birth Number of People Percentage of Foreign-Born (%)
Philippines 258 17.26
India 197 13.18
Korea 90 6.02
Mexico 83 5.55
Germany 80 5.35
Egypt 61 4.08
Kuwait 55 3.68
Jordan 54 3.61
Thailand 44 2.94
China 43 2.88
Jamaica 41 2.74
Brazil 40 2.68
Haiti 38 2.54
Japan 36 2.41
Canada 31 2.07
England 20 1.34
Guyana 16 1.07
Iraq 15 1.00
Italy 14 0.94
Hungary 14 0.94
Poland 12 0.80
Cambodia 11 0.74
Honduras 10 0.67
Austria 8 0.54
Vietnam 6 0.40
Uzbekistan 2 0.13