Ranking of Illinois Counties By Population with Celtic Ancestry in 2021
Updated on April 16, 2025.
Based on the US Census ACS-5Yrs estimates, in 2021, there were 778 people in Illinois with Celtic ancestry. Among all Illinois counties, Cook County had the highest population with Celtic ancestry (360), followed by DuPage County (112), and Winnebago County (50).
The chart and table below shows the top 10 counties with high number of people with Celtic ancestry.
You can see similar information for other states and for other ancestry groups in Illinois.
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Related Topics: Illinois ACS-5Yrs Estimates, 2021 Topic List.
Data Source: US Census Bureau.
Ranking of Illinois Counties By Population with Celtic Ancestry in 2021
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| Rank | County | Population |
|---|---|---|
| 1 | Cook County | 360 |
| 2 | DuPage County | 112 |
| 3 | Winnebago County | 50 |
| 4 | St. Clair County | 41 |
| 5 | Will County | 38 |
| 6 | Effingham County | 20 |
| 6 | McHenry County | 20 |
| 7 | Ogle County | 19 |
| 8 | McLean County | 17 |
| 8 | Madison County | 17 |
| 9 | Kankakee County | 11 |
| 9 | Macon County | 11 |
| 10 | Woodford County | 10 |
| 11 | Kane County | 9 |
| 12 | Clay County | 8 |
| 12 | Peoria County | 8 |
| 13 | Lake County | 5 |
| 14 | Sangamon County | 4 |
| 14 | Wayne County | 4 |
| 15 | De Witt County | 3 |
| 15 | Henry County | 3 |
| 15 | Vermilion County | 3 |
| 16 | Adams County | 2 |
| 16 | Bureau County | 2 |
| 17 | Jackson County | 1 |
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