Solano County California (Historic Districts) has 7 places on the National Register of Historic Places including 4 places of National significance. Significant places include Benicia Arsenal, Mare Island Historic District(Boundary Increase), Mare Island Naval Shipyard and Vallejo Old City Historic District and Pleasants Ranch.
Some of the country's most noteable architects helped create the Solano County places including USN Bureau of Yards and Docks and A.A. Cook. Prominent architectural styles found in Solano Country are Queen Anne, Late Victorian and Bungalow/Craftsman.