Demographics & People — Altadena, California

Population Overview

Population (Census)41,921
Estimated 2026~41,200
Median Age46.4
Total Households15,018
Family Households10,667
Average Household Size2.73
Diversity Index0.6577 (highly diverse)

Race & Ethnicity

White19,287
Black or African American7,555
Asian2,370
Hispanic or Latino11,404

Heritage & Ancestry

GroupCount
Other groups19,378
Hispanic: Hispanic or Latino11,505
Hispanic: Mexican7,699
Unclassified or not reported7,139
German3,892
English3,878
Irish3,268
Armenian2,932
Italian2,166
Hispanic: Central American2,028

Language

English Only27,349
Spanish7,859
Population 5+39,809

Veterans

Veterans1,681
Population 18+33,967

Commuting

Mean Commute Time27.5 minutes
Work from Home25.4%
Commuter ProfileN/A
Source: Census ACS 5-Year 2023; Census ACS 5-Year 2023, Table B01003; Census ACS 5-Year 2023, B19013. Data for Altadena, California.