San Francisco Fleet Yards (also known as San Francisco Navy Yards or simply San Francisco Yards) was a Starfleet shipyard located in Earth orbit, with its shore offices probably located in the city of San Francisco. There was also an orbital office complex near the drydocks of the yard. (Star Trek: The Motion Picture)
Among the ships built at the San Francisco Fleet Yards were the USS Enterprise, USS Enterprise-A, USS Excelsior, USS Stargazer, USS Sutherland (NCC-72015) and USS Enterprise-E.
In the alternate reality, the USS Enterprise was under construction at the Riverside Shipyard in Iowa but was launched from the San Francisco Fleet Yards. (Star Trek, production art)