Demographics & People — Marietta, Illinois
Population Overview
| Population (Census) | 110 |
|---|
| Estimated 2026 | ~200 |
|---|
| Median Age | 34.7 |
|---|
| Total Households | 47 |
|---|
| Family Households | 33 |
|---|
| Average Household Size | 2.34 |
|---|
| Diversity Index | 0.0 (relatively homogeneous) |
|---|
Race & Ethnicity
| White | 110 |
|---|
| Black or African American | 0 |
|---|
| Asian | 0 |
|---|
| Hispanic or Latino | 0 |
|---|
Heritage & Ancestry
| Group | Count |
|---|
| Unclassified or not reported | 36 |
| German | 17 |
| Other groups | 13 |
| American | 11 |
| Irish | 7 |
| English | 7 |
| European | 3 |
| Scotch-Irish | 2 |
| British | 1 |
Language
| English Only | 95 |
|---|
| Spanish | 4 |
|---|
| Population 5+ | 99 |
|---|
Veterans
| Veterans | 4 |
|---|
| Population 18+ | 65 |
|---|
Source: Census ACS 5-Year 2023; Census ACS 5-Year 2023, Table B01003; Census ACS 5-Year 2023, B19013. Data for Marietta, Illinois.
