Grossmont Center is an outdoor shopping mall in La Mesa, California, a suburb in East County, San Diego. The mall opened in 1961 and is managed by Federal Realty Investment Trust. The anchor stores are Target, Macy's, RH Outlet, Walmart, Barnes & Noble, and Reading Cinemas.

The mall was built in 1961 by Del E. Webb Construction Company, with Welton Becket and associates as architect. It occupied 110 acres (45 ha) of land and cost over $20 million to build. At the time, it was the largest development in La Mesa's history.

Montgomery Ward and Marston's were the original two anchor stores. Marston's had a location in downtown San Diego, and had begun consultations in 1956 to choose the site of the Grossmont Center store, their first branch location. The store design featured 3,200 feet (980 m) of moldings, gold leaf lettering, murals painted by five artists, and a Gothic-style canopy over its entry. Other major tenants included Longs Drugs, a barbershop, several shoe stores, a florist, a fabric shop, a jeweler, and two dime stores: S. H. Kress & Co. and F. W. Woolworth Company.

Fifty thousand people attended the mall's opening ceremonies on October 5, 1961 – 20,000 more than the population of La Mesa at the time. Present at opening ceremonies were the regional manager of the Montgomery Ward chain; June Wilkinson, a Playboy model; and several representatives of the Marston's chain. Marston's had been sold to Broadway-Hale Stores earlier in 1961, prior to the anchor store's opening, but the Marston's name was retained until 1964, when the store was renamed The Broadway.

By 1965, a 1,000 seat movie theater had been added to the mall. Buffum's was added in 1979 as a third anchor store in a newly constructed wing, and Bullock's joined in 1983 as a fourth anchor. Also at this point, a parking deck was added to the mall. Buffum's closed in 1990, with Bullock's and Woolworth following in 1993, although Cost Plus World Market and a food court were added. The former Buffum's became Oshman's SuperSports USA (later bought out by Sports Authority) in 1991, while Target opened in the vacated Bullock's store in 1995.

See's Candies is an original store at Grossmont Center which stands in the same place and is still doing business.

In 1992, the mall's movie theater complex closed, but it was reopened and expanded on May 26, 1995. Barnes & Noble Booksellers was also added on November 24, 1997, replacing Woolworth which closed in 1993. In between the reopening of the movie theater and the opening of Barnes & Noble, The Broadway chain was bought out by, and changed into a Macy's in 1996. Montgomery Ward closed in 2000 and was replaced by Walmart four years later in 2004. In 2016 Sports Authority closed after the chain filed for bankruptcy. The store was re-tenanted in September 2016 by a Restoration Hardware outlet.

On August 2nd, 1993, a Chuck E. Cheese pizza restaurant opened at Grossmont Center, as a relocation of a Pizza Time Theatre that was located in El Cajon. The Chuck E. Cheese plans to close between 2024 and 2025, when their lease expires. A new updated location 15 minutes from the Grossmont Center CEC in the nearby city of Santee opened on September 18, 2023.

In 2021 Federal Realty, a publicly traded real estate investment trust, purchased a majority interest in the center, which had been owned and operated for decades by one family. Reportedly 99 percent of the retail space was occupied at the time of the sale. Federal Realty is considering options for major redevelopment in 2025, when they will have full control of the space.

• Grossmont Center