Lancaster High School is a public, co-educational high school located in Lancaster, California, United States.

On September 14, 2022, Lancaster High School was placed on lockdown due to multiple reports of an active shooter on campus.

Los Angeles County Sheriff’s deputies swarmed the campus and conducted a room-by-room and building-by-building search following the call for service.

After a thorough search of the campus by law enforcement partners, there was no evidence of a crime and the report was determined to be a prank call.

It also prompted Antelope Valley College to cancel a previously scheduled evacuation drill.