San Joaquin County, California
San Joaquin County ( SAN whah-KEEN; Spanish: San Joaquín, meaning "St. Joachim"), officially the County of San Joaquin, is located in the U.S. state of California. As of the 2020 United States census, the population was 779,233. The county seat is Stockton.
San Joaquin County comprises the Stockton–Lodi–Tracy metropolitan statistical area within the regional San Jose–San Francisco–Oakland combined statistical area. The county is located in Northern California's Central Valley just east of the very highly populated nine-county San Francisco Bay Area region. It is separated from the East Bay partly by the Diablo Range, through which there is road and rail access to Alameda County via the Altamont Pass, and partly by the Sacramento-San Joaquin Delta, through which there are links to Contra Costa County via road, rail, and shipping, and to Solano County via road. One of the smaller counties by area in California, it has a high population density and is growing rapidly due to overflow from the Bay Area.
The City of San Joaquin, despite sharing its name with the county, is in Fresno County about 100 miles away.