Manhattan Beach is a city in southwestern Los Angeles County, California, United States, on the Pacific coast south of El Segundo, west of Hawthorne and Redondo Beach, and north of Hermosa Beach. As of the 2020 census, the population was 35,506.Manhattan Beach is one of the three Beach Cities, along with Hermosa Beach and Redondo Beach within the South Bay region of Los Angeles County. The community is known for a long beach stretching approximately 2.1 miles and roughly 450 feet wide.