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Welcome to San Mateo County ...

Time Zone: San Mateo County lies in the Pacific Time Zone (PST/PDT) and observes daylight saving time.

The community of Redwood City is the Seat for San Mateo County.

San Mateo County was founded in 1856 and was created by taking area from San Francisco County.

From the Census Estimates for 2019, <1> San Mateo had a population of 766,573 people. This is an increase of 6.51% since the last Census (which gave a population of 719,699 people in 2010).

At the time of the 2010 Census, San Mateo represented 1.93% of the total population of California.

Below are some of the communities located in San Mateo County:

  • Atherton
    (8 miles [12.9 km] to the southeast)
    • Jump to our Gazetteer entry for Atherton
    • Atherton is located in San Mateo County (CA)
    • Population from the 2020 Census: 7,011 people
    • Jump to TripAdvisor's Tourism page for Atherton <2>
  • Belmont
    (2 miles [3.2 km] to the east)
    • Jump to our Gazetteer entry for Belmont
    • Belmont is located in San Mateo County (CA)
    • Population from the 2020 Census: 26,533 people
    • Jump to TripAdvisor's Tourism page for Belmont <2>
  • Brisbane
    (11 miles [17.7 km] to the north)
    • Jump to our Gazetteer entry for Brisbane
    • Brisbane is located in San Mateo County (CA)
    • Population from the 2020 Census: 4,576 people
    • Jump to TripAdvisor's Tourism page for Brisbane <2>
  • Burlingame
    (3 miles [4.8 km] to the north)
  • Colma
    (12 miles [19.3 km] to the northwest)
    • Jump to our Gazetteer entry for Colma
    • Colma is located in San Mateo County (CA)
    • Population from the 2020 Census: 1,689 people
    • Jump to TripAdvisor's Tourism page for Colma <2>
  • Daly City
    (13 miles [20.9 km] to the northwest)
    • Jump to our Gazetteer entry for Daly City
    • Daly City is located in San Mateo County (CA)
    • Population from the 2020 Census: 105,868 people
    • Jump to TripAdvisor's Tourism page for Daly City <2>
  • East Palo Alto
    (11 miles [17.7 km] to the east)
  • Foster City
    (4 miles [6.4 km] to the northeast)
  • Continue List   (12 more) ...
    • Half Moon Bay
      (7 miles [11.3 km] to the southwest)
    • Hillsborough
      (3 miles [4.8 km] to the northwest)
    • Menlo Park
      (9 miles [14.5 km] to the southeast)
    • Millbrae
      (5 miles [8 km] to the northwest)
      • Jump to our Gazetteer entry for Millbrae
      • Millbrae is located in San Mateo County (CA)
      • Population from the 2020 Census: 22,630 people
      • Jump to TripAdvisor's Tourism page for Millbrae <2>
    • Pacifica
      (10 miles [16.1 km] to the northwest)
      • Jump to our Gazetteer entry for Pacifica
      • Pacifica is located in San Mateo County (CA)
      • Population from the 2020 Census: 38,013 people
      • Jump to TripAdvisor's Tourism page for Pacifica <2>
    • Portola Valley
      (11 miles [17.7 km] to the southeast)
    • Redwood City
      (6 miles [9.7 km] to the southeast)
    • San Bruno
      (8 miles [12.9 km] to the northwest)
      • Jump to our Gazetteer entry for San Bruno
      • San Bruno is located in San Mateo County (CA)
      • Population from the 2020 Census: 44,051 people
      • Jump to TripAdvisor's Tourism page for San Bruno <2>
    • San Carlos
      (4 miles [6.4 km] to the east)
    • San Mateo
      (2 miles [3.2 km] to the north)
      • Jump to our Gazetteer entry for San Mateo
      • San Mateo is located in San Mateo County (CA)
      • Population from the 2020 Census: 102,398 people
      • Jump to TripAdvisor's Tourism page for San Mateo <2>
    • South San Francisco
      (9 miles [14.5 km] to the northwest)
    • Woodside
      (8 miles [12.9 km] to the southeast)
      • Jump to our Gazetteer entry for Woodside
      • Woodside is located in San Mateo County (CA)
      • Population from the 2020 Census: 5,508 people
      • Jump to TripAdvisor's Tourism page for Woodside <2>

Websites of Interest ...

Footnotes ...

<1>On a yearly basis, the US Census Bureau creates an estimate of the county's population. Keep in mind that this is an estimate and not an actual count. The last physical count was the 2010 Census and the next count will be for the 2020 Census.
<2>While we're fans and frequent users of TripAdvisor, you should know that we're also members of the TripAdvisor affiliate program.
 

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This page was last modified/updated: 23 Mar 2025