Demographics & People — Marquette, Kansas
Population Overview
| Population (Census) | 637 |
| Estimated 2026 | ~500 |
| Median Age | 52.7 |
| Total Households | 294 |
| Family Households | 161 |
| Average Household Size | 2.05 |
| Diversity Index | 0.0286 (relatively homogeneous) |
Race & Ethnicity
| White | 612 |
| Black or African American | 0 |
| Asian | 1 |
| Hispanic or Latino | 8 |
Heritage & Ancestry
| Group | Count |
| German | 250 |
| Other groups | 177 |
| Unclassified or not reported | 154 |
| Swedish | 123 |
| Irish | 110 |
| American | 42 |
| English | 38 |
| French (except Basque) | 33 |
| Italian | 22 |
| Greek | 18 |
Language
| English Only | 600 |
| Spanish | 8 |
| Population 5+ | 613 |
Veterans
| Veterans | 38 |
| Population 18+ | 598 |
Source: Census ACS 5-Year 2023; Census ACS 5-Year 2023, Table B01003; Census ACS 5-Year 2023, B19013. Data for Marquette, Kansas.