Foster Valley is a district of San Fierro in Grand Theft Auto: San Andreas. It is located at the southern tip of the city, between Missionary Hill to the west, and Easter Bay International Airport to the east. To the north is Doherty, and to the south is Mount Chiliad.
Foster Valley is a commercial/industrial district whose architectural centerpiece is a conglomeration of buildings belonging to the Zombotech corporation, closely resembling Oracle Corporation's headquarters in Foster City, California (which may explain the origin of the name Foster Valley). This district enjoy quick freeway access and general isolation from the remainder of the city.