San Lorenzo, California

San Lorenzo
Location in Alameda County and the state of California
San Lorenzo
Location in the United States
Coordinates: 37°40′52″N 122°07′28″W / 37.68111°N 122.12444°W / 37.68111; -122.12444
Country United States
State California
CountyAlameda
Government
  State SenateAisha Wahab (D)
  State AssemblyLiz Ortega (D)
  U. S. CongressEric Swalwell (D)
Area
  Total
3.067 sq mi (7.94 km2)
  Land3.046 sq mi (7.89 km2)
  Water0.021 sq mi (0.05 km2)  0.68%
Elevation
36 ft (11 m)
Population
 (2020)
  Total
29,581
  Density9,600/sq mi (3,700/km2)
Time zoneUTC-8 (Pacific (PST))
  Summer (DST)UTC-7 (PDT)
ZIP code
94580
Area code(s)510, 341
FIPS code06-68112
GNIS feature IDs232433, 1659583, 2409260

San Lorenzo (Spanish for "Saint Laurence") is a census-designated place (CDP) located in the East Bay of the San Francisco Bay Area in Alameda County, California, United States. The population was 29,581 at the 2020 census. It is an unincorporated community, located at the banks of San Lorenzo Creek. It was originally named Squattersville in 1851, but later renamed to San Lorenzo.

In 1944, under contract to the U.S. Navy, The David D. Bohannon Company began construction of San Lorenzo Village, which was one of the nation's first planned communities, with parcels designated for schools, churches, parks, and several retail centers. Bohannon's pioneering pre-cutting techniques, referred to as the "California method," were used in later developments, such as the more famous Levittown, Pennsylvania.