The District encompasses approximately 12.5 square miles, comprising approximately half of the City of Saratoga and adjacent unincorporated lands west and southwest of the City.

The District's boundaries encompass approximately 420 square miles which include the City of Cupertino, Town of Los Gatos, City of Monte Sereno, a portion of the City of Saratoga, unincorporated lands to the County line west of these cities, unincorporated islands within the City of San Jose, unincorporated lands south of the City of San Jose, the unincorporated community of San Martin; and other unincorporated lands surrounding the cities of Morgan Hill and Gilroy including portions of the Diablo Range to the east and the Santa Cruz Mountains to the county line in the west.
 

The District has a contract with the cities of San Jose and Milpitas for service to the unincorporated islands and to the lower eastern foothills. The District also provides service outside its boundaries by contract to the cities of Campbell and Los Altos and to the Los Altos Hills County Fire District and to the Saratoga Fire Protection District.

The District encompasses approximately 11.5 square miles and provides fire protection and emergency medical services to the Town of Los Altos Hills and to the unincorporated area adjacent (Loyola and San Antonio Hills area) to the Town. The District also provides fire protection services to the Los Trancos Woods area, which is adjacent to both San Mateo County and the City of Palo Alto.