Crown Memorial State Beach, State beach in Alameda, US.

Crown Memorial State Beach is a sandy shoreline in Alameda stretching along San Francisco Bay, with coastal dunes and a water-level bicycle path. This route connects different sections of the coast and provides views across the bay throughout.

From the 1880s until December 1941, the area around today's visitor center was Neptune Beach, an amusement park with bathing spas and waterfront houses, nicknamed "Coney Island of the West." After the U.S. entered World War II, the site became a training base for Merchant Marine commanders. The park was later renamed for Assemblyman Robert W. Crown (1922–1973), who was struck and killed by a vehicle while crossing the street.

The Crab Cove Visitor Center displays exhibits about San Francisco Bay marine life and Alameda's past. Visitors can learn how people have worked alongside the water and what lives in these coastal areas.

Swimming is allowed year-round during park hours, but there are no lifeguards. There is no boat launch; windsurfing, kiteboarding and kayaks are permitted without marked zones. A bathhouse stands at the west end, with picnic tables and barbecue pits beside it, some reservable. Beach wheelchairs are free on a first-come basis, and dogs must stay leashed on lawns and paths, not on the sand.

The Elsie Roemer Bird Sanctuary at the eastern end protects waterbirds and salt marsh species in their natural habitat. This section demonstrates how wildlife and recreation share the same space.