Demographics & People — Mark, Illinois
Population Overview
| Population (Census) | 522 |
|---|
| Estimated 2026 | ~700 |
|---|
| Median Age | 45.0 |
|---|
| Total Households | 251 |
|---|
| Family Households | 171 |
|---|
| Average Household Size | 2.08 |
|---|
| Diversity Index | 0.1294 (relatively homogeneous) |
|---|
Race & Ethnicity
| White | 522 |
|---|
| Black or African American | 0 |
|---|
| Asian | 0 |
|---|
| Hispanic or Latino | 39 |
|---|
Heritage & Ancestry
| Group | Count |
|---|
| Italian | 175 |
| German | 172 |
| Unclassified or not reported | 112 |
| Polish | 77 |
| Other groups | 56 |
| Irish | 41 |
| English | 35 |
| Hispanic: Mexican | 30 |
| Hispanic: Hispanic or Latino | 30 |
| European | 20 |
Language
| English Only | 483 |
|---|
| Spanish | 0 |
|---|
| Population 5+ | 493 |
|---|
Veterans
| Veterans | 26 |
|---|
| Population 18+ | 404 |
|---|
Source: Census ACS 5-Year 2023; Census ACS 5-Year 2023, Table B01003; Census ACS 5-Year 2023, B19013. Data for Mark, Illinois.
