Westchester Enriched Sciences Magnets (WESM) is a magnet high school in the Los Angeles Unified School District, West Region. It is located in Westchester (Los Angeles), a neighborhood adjacent to Los Angeles International Airport and bordered by Playa Vista to the north, Inglewood to the east, El Segundo to the south, and Playa del Rey to the west. Until the 2010–11 school year, the school was a comprehensive high school known as Westchester High School.

Westchester is a neighborhood in the City of Los Angeles and the South Bay Region of Los Angeles County, California.