Mare Island Naval Shipyard, 1866

Union Ironworks shipyard, Alameda, ca 1918

 • Mare Island Naval Shipyard (pictured, left), the first United States Navy base established on the Pacific Ocean, is established in Vallejo, Solano County
 • The Mechanics' Institute Library and Chess Room is founded in San Francisco
 • The city of Alameda is incorporated in Alameda County (Alameda Works Shipyard pictured, right)