Demographics & People — Flat Rock, Illinois
Population Overview
| Population (Census) | 362 |
|---|
| Estimated 2026 | ~300 |
|---|
| Median Age | 41.5 |
|---|
| Total Households | 148 |
|---|
| Family Households | 97 |
|---|
| Average Household Size | 2.45 |
|---|
| Diversity Index | 0.0 (relatively homogeneous) |
|---|
Race & Ethnicity
| White | 354 |
|---|
| Black or African American | 0 |
|---|
| Asian | 0 |
|---|
| Hispanic or Latino | 0 |
|---|
Heritage & Ancestry
| Group | Count |
|---|
| Unclassified or not reported | 198 |
| German | 133 |
| Irish | 67 |
| Other groups | 51 |
| English | 48 |
| American | 37 |
| Norwegian | 10 |
| Dutch | 7 |
| French (except Basque) | 4 |
| Scotch-Irish | 3 |
Language
| English Only | 334 |
|---|
| Spanish | 0 |
|---|
| Population 5+ | 334 |
|---|
Veterans
| Veterans | 20 |
|---|
| Population 18+ | 332 |
|---|
Source: Census ACS 5-Year 2023; Census ACS 5-Year 2023, Table B01003; Census ACS 5-Year 2023, B19013. Data for Flat Rock, Illinois.
