Somersville Towne Center is a regional shopping mall located in Antioch, California. Previously named County East Mall until 2004, the 501,259 square feet (46,570 m2) mall is managed by The Macerich Company. Originally opened in 1966 , it is strategically positioned in one of the fastest growing areas of the San Francisco Bay area, east Contra Costa County. Along with high population growth, east Contra Costa County is also experiencing sizable household income increases. Somersville Towne Center is the only enclosed regional mall in east Contra Costa County.
The mall is anchored by Gottschalks, Macy's, Mervyn's, Sears, and Marshall's.