Seal Beach is a city in Orange County, California. The population was 24,157 at the 2000 census. The City was incorporated on 25 October, 1915.

Seal Beach is located in the north-westernmost corner of Orange County. San Pedro Bay, part of the Pacific Ocean, lies to the northwest. To the northwest, just across the border of Los Angeles County, lies the city of Long Beach. To the southeast is Huntington Harbour (part of Huntington Beach) and the unincorporated community of Sunset Beach. To the east is the city of Westminster and the community of West Garden Grove. To the north is the unincorporated community of Rossmoor and the city of Los Alamitos.