Demographics & People — Altadena, California
Population Overview
| Population (Census) | 41,921 |
| Estimated 2026 | ~41,200 |
| Median Age | 46.4 |
| Total Households | 15,018 |
| Family Households | 10,667 |
| Average Household Size | 2.73 |
| Diversity Index | 0.6577 (highly diverse) |
Race & Ethnicity
| White | 19,287 |
| Black or African American | 7,555 |
| Asian | 2,370 |
| Hispanic or Latino | 11,404 |
Heritage & Ancestry
| Group | Count |
| Other groups | 19,378 |
| Hispanic: Hispanic or Latino | 11,505 |
| Hispanic: Mexican | 7,699 |
| Unclassified or not reported | 7,139 |
| German | 3,892 |
| English | 3,878 |
| Irish | 3,268 |
| Armenian | 2,932 |
| Italian | 2,166 |
| Hispanic: Central American | 2,028 |
Language
| English Only | 27,349 |
| Spanish | 7,859 |
| Population 5+ | 39,809 |
Veterans
| Veterans | 1,681 |
| Population 18+ | 33,967 |
Commuting
| Mean Commute Time | 27.5 minutes |
| Work from Home | 25.4% |
| Commuter Profile | N/A |
Source: Census ACS 5-Year 2023; Census ACS 5-Year 2023, Table B01003; Census ACS 5-Year 2023, B19013. Data for Altadena, California.