Mission Beach is a community built on a sandbar between the Pacific Ocean and Mission Bay. It is part of the city of San Diego, California.

Mission Beach spans nearly two miles of ocean front. It is bounded by the San Diego River estuary on the south, Mission Bay Park on the east, and the community of Pacific Beach on the north. A boardwalk runs along the beaches on both the ocean and bay sides of the community. The main artery through Mission Beach is Mission Boulevard. The community is divided into South Mission, a peninsula, and North Mission. At the south end of the beach a jetty, with grass, parking and a walk, extends into the ocean.

Attractions near Mission Beach include SeaWorld in Mission Bay Park and the historic amusement park Belmont Park in South Mission Beach. Belmont Park was originally built as the Mission Beach Amusement Center by John D. Spreckels in 1925 to stimulate real estate sales and to promote his electric railway. Belmont Park now features the original wooden Giant Dipper Roller Coaster as well as newer rides such as the FlowRider® at Wave House, Chaos, Vertical Plunge, Krazy Kars, Tilt-a-Whirl, Liberty Carousel, Crazy Submarine, The Beach Blaster, and The Chaos.

Mission Beach offers opportunities to participate in sunbathing, horseshoes, surfing, bicycling, skateboarding, Frisbee tossing, and other outdoor activities. This is a great area for weekly vacation rentals. The summer months and spring break are very high volume tourism season for Mission Beach.