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Alameda County


Facts & Information

The Cities and communities of Alameda County, California *

, Albany, Ashland
Castro Valley, Cherryland
Fairmont Terrace, Fairview, Fremont
Oakland (county seat)
Piedmont, Pleasanton
San Leandro, San Lorenzo, Sunol
Union City

*This list of cities may not be complete. The list may contain towns, cities, villages, boroughs, neighborhoods, townships, ghost towns and other populated places.

If you have information about any of these unlinked communities, please send it to us and we will add a page for that community. Some of these places above may only be neighborhoods or local area names and are not listed with the census at all or just included in a larger surrounding designated census area..

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Information & Facts about Alameda County, California
"The Bright Side of the Bay"

Attractions & other Information - Climate - Economy - Genealogy - Geography -
Government - History - Libraries - Location - Organizations & Groups -
Other Facts & Figures - Population - Schools


Alameda County official website

County Administration Building
1221 Oak Street
Oakland, CA 94612
Phone: (510) 272-6347
Fax: (510) 272-3784
Hours: 8:30 a.m. to 5:00 p.m.

The County Seat is Oakland. The county is governed by a Board of Supervisors who are elected.

Alameda County Superior Court

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1900 - 130,197
1910 - 246,131
1920 - 344,177
1930 - 474,883
1940 - 513,011
1950 - 740,315
1960 - 980,209
1970 - 1,073,184
1980 - 1,105,379
1990 - 1,279,182
1995 - 1,356,102
1998 - 1,408,073
2000 - 1,443,741
2003 - 1,461,030
2005 - 1,448,905
2006 - 1,457,426

Housing Units:
2000 - 540,183

2000 - 1,957.4 persons per square mile

Number of persons per household:
1998 - 2.8 persons

Census quick facts page for Alameda County

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The county is located in the East Bay region of the San Francisco Bay area.

Neighboring Counties include:
North - Contra Costa County
East - San Joaquin County
Southeast - Stanislaus County
South - Santa Clara County
West - San Mateo County
West - San Francisco County

Alameda, San Joaquin, Santa Clara and Stanislaus Counties all share a four corner border.

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Annual Average Rainfall: 23.5 inches

Average Temperature - 58.3 degrees F.
Average High Temperature - 67.6 degrees F.
Average Low Temperature - 50.4 degrees F.

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Other Facts and Figures:

Median Household Income:
1999 - $55,946

Per capita Income:
2000 - $26,680
2002 - $37,945

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Alameda County is a Charter County. The charter and incorporation date is 25 March 1853. The county was formed from Contra Costa and Santa Clara Counties.

The name was chosen by early explorers for a creek they discovered that reminded them of a road lined with trees that is known as an alameda. They named the creek Arroyo de la Alameda or Poplar Grove Creek.

The first county seat was at Alvarado in 1853. Next, in 1856, it was moved to San Leandro. When an earthquake on the Hayward Fault in 1868 destroyed the courthouse and the area, the seat was moved to Brooklyn where it remained from 1872 to 1875. Brooklyn was absorbed by Oakland which was named the seat in 1873.

History links for the county.
More history information for the county

Cities and communities in Alameda County - both past and present. Some don't exist today and others do, but with a different name or it is still the same

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Land Area 738 square miles
Water Area: 84 square miles
Total Area: 821 Square Miles

at City Hall - 39 feet above sea level

The county borders the San Francisco Bay on the west with the Berkeley Hills running through the center. The Hayward Fault and Calaveras Fault both run through portions of the county.

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Alameda County US GenWeb Project page
Cemeteries in Alameda County
Kindred Trails page for Alameda County
The Political Graveyard page for Alameda County
Linkpendium page for Alameda County

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Alameda County Library

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Alameda Unified School District
2200 Central Avenue
Alameda, Ca., 94501
Phone: 510-337-7060

University of California at Berkeley

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Employment Development Department of the State of California for Alameda County

The East Bay Economic Development Alliance

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Organizations & Groups

Association of Bay Area Governments

Oakland Metropolitan Chamber
475 14th Street
Oakland, CA 94612-1900
Phone: (510) 874-4800
Fax: (510) 839-8817

Hispanic Chamber of Commerce for Alameda County
3801 Foothill Boulevard
Oakland, CA 94601
Phone: (510) 534-1129

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Attractions & Other Information

Alameda County Fairgrounds
4501 Pleasanton Avenue
Pleasanton, CA 94566
Phone: (925) 426-7600
Fax: (925) 426-7599

Alameda Civic Ballet

BART - San Francisco Bay Area Rapid Transit District

Lawrence Hall of Science

Tilden Regional Park
Ride the Herschell-Spillman merry-go-round, visit the Botanic Gardens, Ride the Steam Train or choose any of the other activities at this park with 2,079 acres.

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This page was last updated on 27 March 2009 at 10:07 pm
This page was created on 31 October 2001

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