Fashion Valley is an upscale, open-air shopping mall in Mission Valley in San Diego, California. The shopping center has 1,720,533 sq ft (159,842.7 m2) of leasable floor area, making it the largest mall in San Diego and one of the largest in California. It is managed by the 50% owner Simon Property Group.

Mission Valley is a wide river valley trending east–west in San Diego, California, United States, through which the San Diego River flows to the Pacific Ocean. For planning purposes the city of San Diego divides it into two neighborhoods: Mission Valley East and Mission Valley West.