Demographics & People — Marlborough, Missouri
Population Overview
| Population (Census) | 2,366 |
| Estimated 2026 | ~1,700 |
| Median Age | 32.3 |
| Total Households | 1,459 |
| Family Households | 510 |
| Average Household Size | 1.62 |
| Diversity Index | 0.3366 (somewhat diverse) |
Race & Ethnicity
| White | 1,879 |
| Black or African American | 156 |
| Asian | 83 |
| Hispanic or Latino | 214 |
Heritage & Ancestry
| Group | Count |
| German | 637 |
| Other groups | 546 |
| Irish | 479 |
| English | 402 |
| Unclassified or not reported | 351 |
| Italian | 217 |
| Hispanic: Hispanic or Latino | 194 |
| American | 175 |
| Hispanic: Mexican | 146 |
| Polish | 99 |
Language
| English Only | 2,212 |
| Spanish | 30 |
| Population 5+ | 2,325 |
Veterans
| Veterans | 87 |
| Population 18+ | 2,278 |
Source: Census ACS 5-Year 2023; Census ACS 5-Year 2023, Table B01003; Census ACS 5-Year 2023, B19013. Data for Marlborough, Missouri.