Category:San Diego–Tijuana

{{Portal|California|Mexico}}

{{commons category|San Diego–Tijuana}}

{{Cat main|San Diego–Tijuana}}

Category:Metropolitan areas of California

Category:Metropolitan areas of Baja California

Category:Baja California–California relations

Category:Southern California

Category:Twin cities

Category:Wikipedia categories named after regions of Mexico

Category:Regions of California

Category:Regions of the West Coast of the United States

Category:Mexico–United States border