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The South Coast is a term used in the West Coast region of the United States to refer to both the south Pacific Coast of California and the adjacent resort and residential communities.
It refers for the most part to the Southern California coastal counties of Ventura, Los Angeles, Orange, and San Diego due to the cosmopolitan "SoCal" atmosphere and location of major urban coastal centers. Of these counties only the western two-thirds of San Diego, coastal half of Ventura, most of Los Angeles and all of Orange are included.
However, some sources include the western part of Riverside, and southwestern part of San Bernardino Counties, and the northwestern corner of Baja California, because of their proximity to the Pacific Coast and because they are in the same bio-region and watershed.