Morro Bay State Park, Coastal state park in San Luis Obispo County, USA.

Morro Bay State Park is a protected coastal area in central California containing tidal wetlands, an estuary, and dry scrubland vegetation. The terrain combines these different habitats where salt marshes meet open water and transition into upland brush zones.

The Chumash lived along this coast for many generations, relying heavily on the bay's marine resources for their survival. European arrival brought major changes to the landscape and people, and the area eventually became a protected reserve.

The Museum of Natural History holds exhibits on Chumash life, geology and oceanography. The Chumash were Millingstone Horizon people who fished and gathered shellfish from the bay; the Back Bay site in Los Osos, a Chumash settlement on a stabilized sand dune, dates to at least 800–1200 AD. Cabrillo met the Chumash in 1542.

The park offers overnight camping with reserved spots and kayak rentals for exploring the bay waters. Free guided walks with park rangers happen regularly and help visitors understand the different habitats throughout the grounds.

Two of the Nine Sisters chain of volcanic peaks, Black Hill and Cerro Cabrillo, lie inside the park; Morro Rock itself stands outside it, at the bay's mouth. A trail through Monterey pine trees in Flemings Forest climbs Black Hill. Offshore, the Morro Bay State Marine Reserve and State Marine Recreational Management Area protect ocean wildlife.