Star Fleet Academy Campus
The Headquarters of Star Fleet Academy were located in the Presidio in San Francisco, while the Academy training facility itself was located in Marin County across the Golden Gate Bridge. Staff accommodations for flag officers were next to the northern part of the Golden Gate Bridge also in Marin County. (Star Trek II: The Wrath of Khan; Star Trek III: The Search for Spock)
Administration buildings were located in San Francisco's Downtown Financial District. (VOY: "Non Sequitur").