Demographics & People — St. Mary, Missouri
Population Overview
| Population (Census) | 255 |
|---|
| Estimated 2026 | ~400 |
|---|
| Median Age | 48.9 |
|---|
| Total Households | 100 |
|---|
| Family Households | 55 |
|---|
| Average Household Size | 2.55 |
|---|
| Diversity Index | 0.1879 (relatively homogeneous) |
|---|
Race & Ethnicity
| White | 207 |
|---|
| Black or African American | 22 |
|---|
| Asian | 0 |
|---|
| Hispanic or Latino | 2 |
|---|
Heritage & Ancestry
| Group | Count |
|---|
| Unclassified or not reported | 100 |
| German | 51 |
| Other groups | 49 |
| Irish | 28 |
| American | 18 |
| French (except Basque) | 9 |
| Scottish | 6 |
| Italian | 5 |
| English | 5 |
| Ukrainian | 1 |
Language
| English Only | 224 |
|---|
| Spanish | 3 |
|---|
| Population 5+ | 227 |
|---|
Veterans
| Veterans | 25 |
|---|
| Population 18+ | 200 |
|---|
Source: Census ACS 5-Year 2023; Census ACS 5-Year 2023, Table B01003; Census ACS 5-Year 2023, B19013. Data for St. Mary, Missouri.
