Oceano is a census-designated place in San Luis Obispo County, California, United States. The population was 7,286 at the 2010 census, up from 7,260 at the 2000 census. "Océano" (with accent) is the Spanish word for "ocean", but the toponymic name is written without the accent.
Oceano is located at 35°6′10″N 120°36′41″W (35.102680, -120.611471). Oceano is part of the 5 Cities Metropolitan Area. According to the United States Census Bureau, the CDP has a total area of 1.5 square miles (3.9 km2), of which, 1.5 square miles (3.9 km2) of it is land and 0.02 square miles (0.052 km2) of it (0.98%) is water. Oceano's beach is the Oceano Dunes State Vehicular Recreation Area, a 1,500 acres (6.1 km2) coastal sand dune. As the only state park in California where visitors may drive vehicles on the beach, tourists are attracted from all over the United States. Activities on this beach include riding the sand dunes on all-terrain-vehicles, swimming, clamming, camping, surfing, surf fishing, hiking, and bird watching.