Demographics & People — Old Mill Creek, Illinois
Population Overview
| Population (Census) | 131 |
|---|
| Estimated 2026 | ~200 |
|---|
| Median Age | 47.3 |
|---|
| Total Households | 60 |
|---|
| Family Households | 34 |
|---|
| Average Household Size | 2.18 |
|---|
| Diversity Index | 0.2069 (somewhat diverse) |
|---|
Race & Ethnicity
| White | 113 |
|---|
| Black or African American | 0 |
|---|
| Asian | 0 |
|---|
| Hispanic or Latino | 15 |
|---|
Heritage & Ancestry
| Group | Count |
|---|
| Unclassified or not reported | 27 |
| English | 23 |
| German | 21 |
| Irish | 14 |
| Italian | 12 |
| Polish | 10 |
| Other groups | 10 |
| Hispanic: Mexican | 10 |
| Hispanic: Hispanic or Latino | 10 |
| French (except Basque) | 8 |
Language
| English Only | 95 |
|---|
| Spanish | 16 |
|---|
| Population 5+ | 119 |
|---|
Veterans
| Veterans | 7 |
|---|
| Population 18+ | 93 |
|---|
Source: Census ACS 5-Year 2023; Census ACS 5-Year 2023, Table B01003; Census ACS 5-Year 2023, B19013. Data for Old Mill Creek, Illinois.
