Town in San Mateo County, California · 9.1 sq mi · 468 people per sq mi
4,249 people live in Portola Valley. The typical household earns $250,001, and the median resident is 60.6 years old.
2026 projection
From 4,456 in 2020
Poverty rate 6.15%
Men 56.4 · Women 62.1
1970–2026
4,249
2026 projection
4.6% since 2020 (decrease)
Source: U.S. Census Bureau decennial counts and annual estimates, including 2010–2020 intercensal estimates. 2026 is a projection. Values between recorded years are interpolated.
Use the left and right arrow keys to inspect population observations.
1970–2026
4,249
2026 projection
4.6% since 2020 (decrease)
Source: U.S. Census Bureau decennial counts and annual estimates, including 2010–2020 intercensal estimates. 2026 is a projection. Values between recorded years are interpolated.
Use the left and right arrow keys to inspect population observations.
| 2026 | 4,249 | -43 | 1.00% |
|---|---|---|---|
| 2025 | 4,292 | +19 | 0.44% |
| 2024 | 4,273 | +33 | 0.78% |
| 2023 | 4,240 | 0 | 0.00% |
| 2022 | 4,240 | -53 | 1.23% |
| 2021 | 4,293 | -163 | 3.66% |
| 2020 | 4,456 | -21 | 0.47% |
| 2019 | 4,477 | -40 | 0.89% |
| 2018 | 4,517 | -20 | 0.44% |
| 2017 | 4,537 | -16 | 0.35% |
Showing 10 of 21 years.
The 2020 row compares the April 1 Census count with the July 1, 2019 estimate (about nine months). Its Growth and Annual change therefore do not represent a full year.
Portola Valley has a population change lower than San Mateo County, California, and the U.S.
Change from July 1, 2020 to July 1, 2025 population estimates—not annualized growth or site projections.
Source: U.S. Census Bureau. U.S. totals are summed from the 50 states and D.C.; unavailable comparisons are omitted.
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S0101
Each square is about 1% of residents (roughly 43 people).
Hispanic or Latino residents can be of any race. All other groups exclude Hispanic residents.
U.S. Census Bureau, 2024 ACS 5-year estimates · Table B03002
Half of households earn more, half earn less
Typical yearly pay for a worker 25 or older.
About 1 in 16 residents
67% of residents age 15 and older are married.
| Status | Overall | Male | Female |
|---|---|---|---|
| Married | 67% | 70% | 65% |
| Never married | 17% | 23% | 11% |
| Divorced | 11% | 5% | 17% |
| Widowed | 5% | 3% | 6% |
| Separated | <1% | 0% | 1% |
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S1201
14 sources