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Welcome to Alameda County ...

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

The community of Oakland is the Seat for Alameda County.

Alameda County was founded March 25, 1853. Alameda was created by taking area from Contra Costa and Santa Clara Counties.

From the Census Estimates for 2019, <1> Alameda had a population of 1,671,329 people. This is an increase of 10.47% since the last Census (which gave a population of 1,512,986 people in 2010).

At the time of the 2010 Census, Alameda represented 4.06% of the total population of California.

Below are some of the communities located in Alameda County:

  • Alameda
    (8 miles [12.9 km] to the west)
    • Jump to our Gazetteer entry for Alameda
    • Alameda is located in Alameda County (CA)
    • Population from the 2020 Census: 78,841 people
    • Jump to TripAdvisor's Tourism page for Alameda <2>
  • Albany
    (16 miles [25.7 km] to the northwest)
    • Jump to our Gazetteer entry for Albany
    • Albany is located in Alameda County (CA)
    • Population from the 2020 Census: 20,031 people
    • Jump to TripAdvisor's Tourism page for Albany <2>
  • Berkeley
    (14 miles [22.5 km] to the northwest)
    • Jump to our Gazetteer entry for Berkeley
    • Berkeley is located in Alameda County (CA)
    • Population from the 2020 Census: 122,726 people
    • Jump to TripAdvisor's Tourism page for Berkeley <2>
  • Dublin
    (9 miles [14.5 km] to the east)
    • Jump to our Gazetteer entry for Dublin
    • Dublin is located in Alameda County (CA)
    • Population from the 2020 Census: 66,936 people
    • Jump to TripAdvisor's Tourism page for Dublin <2>
  • Emeryville
    (13 miles [20.9 km] to the northwest)
  • Fremont
    (12 miles [19.3 km] to the southeast)
    • Jump to our Gazetteer entry for Fremont
    • Fremont is located in Alameda County (CA)
    • Population from the 2020 Census: 234,569 people
    • Former names for Fremont:
    • Centerville
    • Irvington
    • Mission San Jose
    • Niles
    • Warm Springs
    • Jump to TripAdvisor's Tourism page for Fremont <2>
  • Hayward
    (3 miles [4.8 km] to the south)
    • Jump to our Gazetteer entry for Hayward
    • Hayward is located in Alameda County (CA)
    • Population from the 2020 Census: 157,966 people
    • Jump to TripAdvisor's Tourism page for Hayward <2>
  • Livermore
    (18 miles [29 km] to the east)
  • Continue List   (6 more) ...
    • Newark
      (13 miles [20.9 km] to the south)
      • Jump to our Gazetteer entry for Newark
      • Newark is located in Alameda County (CA)
      • Population from the 2020 Census: 49,699 people
      • Jump to TripAdvisor's Tourism page for Newark <2>
    • Oakland
      (11 miles [17.7 km] to the northwest)
      • Jump to our Gazetteer entry for Oakland
      • Oakland is located in Alameda County (CA)
      • Population from the 2020 Census: 424,891 people
      • Jump to TripAdvisor's Tourism page for Oakland <2>
    • Piedmont
      (10 miles [16.1 km] to the northwest)
      • Jump to our Gazetteer entry for Piedmont
      • Piedmont is located in Alameda County (CA)
      • Population from the 2020 Census: 11,335 people
      • Jump to TripAdvisor's Tourism page for Piedmont <2>
    • Pleasanton
      (12 miles [19.3 km] to the east)
    • San Leandro
      (3 miles [4.8 km] to the west)
    • Union City
      (9 miles [14.5 km] to the south)
      • Jump to our Gazetteer entry for Union City
      • Union City is located in Alameda County (CA)
      • Population from the 2020 Census: 74,501 people
      • Former name for Union City:
      • Decoto
      • Jump to TripAdvisor's Tourism page for Union City <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. For more information, please visit the U.S. Census Bureau.
<2>While we're fans and frequent users of TripAdvisor, you should know that we're also members of the TripAdvisor affiliate program.