Demographics & People — Colby, Kansas
Population Overview
| Population (Census) | 5,389 |
| Estimated 2026 | ~5,400 |
| Median Age | 32.3 |
| Total Households | 2,090 |
| Family Households | 1,182 |
| Average Household Size | 2.37 |
| Diversity Index | 0.1878 (relatively homogeneous) |
Race & Ethnicity
| White | 4,932 |
| Black or African American | 97 |
| Asian | 12 |
| Hispanic or Latino | 456 |
Heritage & Ancestry
| Group | Count |
| German | 1,914 |
| Unclassified or not reported | 1,728 |
| Other groups | 660 |
| Irish | 591 |
| English | 569 |
| Hispanic: Hispanic or Latino | 468 |
| Hispanic: Mexican | 438 |
| Polish | 209 |
| Italian | 147 |
| American | 134 |
Language
| English Only | 4,693 |
| Spanish | 270 |
| Population 5+ | 5,043 |
Veterans
| Veterans | 276 |
| Population 18+ | 4,037 |
Source: Census ACS 5-Year 2023; Census ACS 5-Year 2023, Table B01003; Census ACS 5-Year 2023, B19013. Data for Colby, Kansas.