Winnetka is located next to Canoga Park on the west, Woodland Hills on the south, Chatsworth to the north, and Reseda to the east. Corbin Avenue is the eastern boundary, DeSoto Avenue is the western boundary, Victory Boulevard is the southern boundary, and Nordhoff Street is the northern boundary. It is bordered by the Southern Pacific Coast Line railroad to the north and the Los Angeles River to the south. Major thoroughfares include Winnetka Avenue, Mason Avenue, Roscoe Boulevard, Sherman Way, Saticoy Street, Parthenia Street and Vanowen Street. The postal ZIP code is 91306, the telephone area code (818).