Demographics & People — Castaic, California
Population Overview
| Population (Census) | 18,479 |
| Estimated 2026 | ~16,900 |
| Median Age | 37.9 |
| Total Households | 5,816 |
| Family Households | 4,901 |
| Average Household Size | 3.18 |
| Diversity Index | 0.5912 (moderately diverse) |
Race & Ethnicity
| White | 10,107 |
| Black or African American | 275 |
| Asian | 2,201 |
| Hispanic or Latino | 6,689 |
Heritage & Ancestry
| Group | Count |
| Other groups | 8,619 |
| Hispanic: Hispanic or Latino | 6,457 |
| Hispanic: Mexican | 4,310 |
| Unclassified or not reported | 2,816 |
| German | 1,876 |
| English | 1,576 |
| Hispanic: Central American | 1,300 |
| Irish | 1,167 |
| Hispanic: Salvadoran | 906 |
| European | 900 |
Language
| English Only | 11,717 |
| Spanish | 3,383 |
| Population 5+ | 17,223 |
Veterans
| Veterans | 507 |
| Population 18+ | 13,566 |
Commuting
| Mean Commute Time | 31.0 minutes |
| Work from Home | 16.2% |
| 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 Castaic, California.