Vallejo ( və-LAY-(h)oh; Spanish: [baˈʎexo]) is a waterfront city in Solano County, California, located in the North Bay subregion of the San Francisco Bay Area. Vallejo is geographically the closest North Bay city to the inner East Bay, so it is sometimes associated with that region. Its population was 115,942 at the 2010 census. It is the tenth most populous city in the San Francisco Bay Area, and the largest in Solano County.
The city is named after Don Mariano Guadalupe Vallejo, the famed Californio general and statesman. He was a leading proponent of California's statehood and one of the first members of the California State Senate. The neighboring city of Benicia is named for his wife, Francisca Benicia Carrillo de Vallejo. Vallejo has twice served as the capital of the state of California: once in 1852 and again in 1853.Vallejo sits on the northeastern shore of San Pablo Bay, 30 mi (48 km) north of San Francisco, the northwestern shore of the Carquinez Strait and the southern end of the Napa River, 15 mi (24 km) south of Napa. Vallejo is home to the California Maritime Academy, Six Flags Discovery Kingdom theme park, the former Mare Island Naval Shipyard, and the regional office for Region 5 of the United States Forest Service.