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County · California
San Mateo County
742,893Population
-2.8 %Change since 2020
-523Net migration
3.9 %Unemployment rate
Facts
- Population
- 742,893 (2024)
- Change since 2020
- -2.8 %
- Net migration
- -523 (2023)
- Unemployment rate
- 3.9 % (2025)
- State
- California
- Population base, April 2020
- 764,659 (2020)
- Births
- 7,312 (2023)
- Births per 1,000 residents, 2023
- 9.8
- Deaths
- 5,084 (2023)
- Deaths per 1,000 residents, 2023
- 6.8
- Natural change, 2023
- 2,228
- International migration
- 10,203 (2023)
- Domestic migration
- -10,726 (2023)
- Net migration per 1,000, 2023
- -0.7
- Postal code
- CA
- FIPS code
- 06081
Sources: US Census Bureau — Population Estimates, Bureau of Labor Statistics — LAUS
Unemployment rate, annual average
| Period | Value |
|---|---|
| 2025 | 3.9 % |
| 2024 | 3.7 % |
| 2023 | 3.1 % |
| 2022 | 2.6 % |
| 2021 | 4.9 % |
| 2020 | 7.4 % |
| 2019 | 2.2 % |
| 2018 | 2.4 % |
| 2017 | 2.9 % |
| 2016 | 3.3 % |
| 2015 | 3.4 % |
| 2014 | 4.3 % |
Population estimates, 2020–2024
| Period | Value |
|---|---|
| 2024 | 742,893 |
| 2023 | 734,267 |
| 2022 | 732,485 |
| 2021 | 739,330 |
| 2020 | 762,727 |