Demographics & People — San Marino, California
Population Overview
| Population (Census) | 12,279 |
| Estimated 2026 | ~12,100 |
| Median Age | 45.7 |
| Total Households | 3,807 |
| Family Households | 3,230 |
| Average Household Size | 3.2 |
| Diversity Index | 0.4609 (moderately diverse) |
Race & Ethnicity
| White | 2,826 |
| Black or African American | 40 |
| Asian | 8,462 |
| Hispanic or Latino | 882 |
Heritage & Ancestry
| Group | Count |
| Other groups | 8,642 |
| Unclassified or not reported | 1,630 |
| Hispanic: Hispanic or Latino | 791 |
| German | 637 |
| English | 450 |
| Irish | 402 |
| Hispanic: Mexican | 370 |
| American | 332 |
| Italian | 252 |
| Scottish | 220 |
Language
| English Only | 4,598 |
| Spanish | 566 |
| Population 5+ | 11,714 |
Veterans
| Veterans | 235 |
| Population 18+ | 9,548 |
Commuting
| Mean Commute Time | 26.6 minutes |
| Work from Home | 28.4% |
| 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 San Marino, California.