Antelope Valley High School is located in Lancaster, California, and is part of the Antelope Valley Union High School District, in northernmost Los Angeles County, California. It was founded in 1909, and had its first graduating class in 1912. It is located near the western edge of the Mojave Desert. At the time of its founding, the school was a residential boarding school serving students from farms and ranches from north Los Angeles and south Kern counties. At present, the school primarily serves the population of Lancaster, California.