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 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 |