Demographics & People — Portola Valley, California
Population Overview
| Population (Census) | 4,329 |
| Estimated 2026 | ~4,200 |
| Median Age | 60.6 |
| Total Households | 1,730 |
| Family Households | 1,197 |
| Average Household Size | 2.48 |
| Diversity Index | 0.3316 (somewhat diverse) |
Race & Ethnicity
| White | 3,446 |
| Black or African American | 10 |
| Asian | 406 |
| Hispanic or Latino | 412 |
Heritage & Ancestry
| Group | Count |
| Other groups | 909 |
| German | 844 |
| Unclassified or not reported | 759 |
| English | 610 |
| Hispanic: Hispanic or Latino | 527 |
| Hispanic: Mexican | 479 |
| Italian | 368 |
| Irish | 351 |
| European | 270 |
| Swedish | 253 |
Language
| English Only | 3,520 |
| Spanish | 62 |
| Population 5+ | 4,085 |
Veterans
| Veterans | 183 |
| Population 18+ | 3,583 |
Source: Census ACS 5-Year 2023; Census ACS 5-Year 2023, Table B01003; Census ACS 5-Year 2023, B19013. Data for Portola Valley, California.