Huntington Beach is a seaside city in Orange County in Southern California, United States. The city is named after American businessman Henry E. Huntington. The population was 198,711 as of the 2020 census, making it the fourth most populous city in Orange County, the most populous beach city in Orange County, and the seventh most populous city in the Los Angeles-Long Beach-Anaheim, CA Metropolitan Statistical Area. Located 35 miles (56 km) southeast of Downtown Los Angeles, it is bordered by Bolsa Chica Basin State Marine Conservation Area on the west, the Pacific Ocean on the southwest, by Seal Beach on the northwest, by Westminster on the north, by Fountain Valley on the northeast, by Costa Mesa on the east, and by Newport Beach on the southeast.

Orange County is a county located in the Los Angeles metropolitan area in Southern California, United States. As of the 2020 census, the population was 3,186,989, making it the third-most-populous county in California, the sixth-most-populous in the United States, and more populous than 19 American states and Washington, D.C. Although largely suburban, it is the second-most-densely-populated county in the state behind San Francisco County. The county's three most-populous cities are Anaheim, Santa Ana, and Irvine, each of which has a population exceeding 300,000. Santa Ana is also the county seat. Six cities in Orange County are on the Pacific coast: Seal Beach, Huntington Beach, Newport Beach, Laguna Beach, Dana Point, and San Clemente.