Mason County, IL Population By Ancestry in 2021 (ACS-5Yrs)
Updated on March 3, 2025.
Based on the US Census ACS-5Yrs estimates, in 2021, among the 13.23K Mason County, IL population, 4.55K had Unclassified ancestry (34.41%), 3.91K had German ancestry (29.56%), and 1.92K had Irish ancestry (14.51%).
The chart below shows the top 10 ancestry groups by percentage, and the table below shows both the population and percentages for many ancestry groups.
You can see similar information for other Illinois counties, and for Illinois.
NB: People could belong to one or more ancestry groups.
Data Source: US Census Bureau.
Mason County, IL Population By Ancestry in 2021
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| Ancestry | Population | Percent of Pop. (%) |
|---|---|---|
| Unclassified | 4550 | 34.41 |
| German | 3909 | 29.56 |
| Irish | 1919 | 14.51 |
| English | 1562 | 11.81 |
| Other Groups | 1426 | 10.78 |
| American | 891 | 6.74 |
| French (except Basque) | 351 | 2.65 |
| Italian | 283 | 2.14 |
| Scottish | 215 | 1.63 |
| Dutch | 202 | 1.53 |
| Scotch Irish | 199 | 1.51 |
| Polish | 196 | 1.48 |
| European | 186 | 1.41 |
| Swedish | 137 | 1.04 |
| Norwegian | 107 | 0.81 |
| Welsh | 96 | 0.73 |
| British | 65 | 0.49 |
| French Canadian | 61 | 0.46 |
| Australian | 32 | 0.24 |
| Hungarian | 31 | 0.23 |
| Portuguese | 27 | 0.20 |
| Belgian | 15 | 0.11 |
| Scandinavian | 15 | 0.11 |
| Swiss | 14 | 0.11 |
| Austrian | 13 | 0.10 |
| Lithuanian | 11 | 0.08 |
| Danish | 9 | 0.07 |
| Pennsylvania German | 8 | 0.06 |
| Czech | 7 | 0.05 |
| Croatian | 5 | 0.04 |
| Eastern European | 5 | 0.04 |
| Subsaharan African | 4 | 0.03 |
| African | 4 | 0.03 |
| Syrian | 3 | 0.02 |
| Northern European | 3 | 0.02 |