Sunset Beach was established as a town on September 8, 1904. It is located in the County of Orange and was unincorporated until 2010 when it was annexed into the city of Huntington Beach. It now falls under that governing jurisdiction.
Sunset Beach is about a mile and a half long, beginning at Anderson Street to the north and ending at Warner Avenue to the south. Pacific Coast Highway (PCH) runs through the middle of Sunset Beach with businesses on both sides of the highway. There is North and South Pacific Avenue, numbered streets to the west of PCH, and most of Sunset Island and Park Avenue to the east. The main street for the island is Bayview Drive and Park Avenue between 9th and 10th Streets on the island side of PCH.