Del Mar (Spanish pronunciation: [del ˈmaɾ]; Spanish for "Of the Sea") is a beach town in San Diego County, California, located on the coast of the Pacific Ocean. Established in 1885 as a seaside resort, the city incorporated in 1959. The Del Mar Horse Races are hosted on the Del Mar racetrack every summer. The population was 3,954 at the 2020 census, down from 4,161 at the 2010 census.