Alameda, California

city in Alameda County, California, United States

Alameda is a city in the U.S. state of California. It is next to Oakland and the San Francisco Bay.

Alameda, California
City Hall
City Hall
Flag of Alameda, California
Official seal of Alameda, California
The Island City
Location in the state of California and Alameda County
Location in the state of California and Alameda County
Coordinates: 37°45′22″N 122°16′28″W / 37.75611°N 122.27444°W / 37.75611; -122.27444
Country United States
State California
 • Total22.98 sq mi (59.52 km2)
 • Land10.45 sq mi (27.06 km2)
 • Water12.53 sq mi (32.45 km2)  53.79%
33 ft (12.8 m)
 • Total78,280
 • Density7,491.63/sq mi (2,892.62/km2)
Time zoneUTC−8 (Pacific Standard Time Zone)
 • Summer (DST)UTC−7 (Pacific Daylight Time)
ZIP code
94501, 94502
Area code(s)510, 341
FIPS code06-00562

Most of Alameda is on an island (called Alameda Island). The other large part is a peninsula connected to the Oakland International Airport. This peninsula is called Bay Farm Island because it used to be an island. The third part of Alameda is Coast Guard Island, which is a military base for the U.S. Coast Guard.



The city was founded in 1853 as 3 smaller towns. At the west end it was called Woodstock. The east end was called Fernside.

Alameda island was originally not an island. It was connected to Oakland. In 1902, a canal was finished that separated it from Oakland.

From 1917 to 1939 there was a popular amusement park called Neptune Beach.

In the 1940s the land was filled to make Bay Farm Island. A U.S. Navy base called Naval Air Station Alameda was opened in 1940. It was closed down in 1997.



  1. 1.0 1.1 "2020 U.S. Gazetteer Files". United States Census Bureau. Retrieved October 30, 2021.