| Lancaster High School | |
| Streetaddress: | 44701 32nd Street West |
| Zipcode: | 93536 |
| Established: | 1995 |
| Principal: | Zachary Mercier |
| Teaching Staff: | 110.41 (FTE) |
| Ratio: | 23.61 |
| Enrollment: | 2,607 (2018–19)[1] |
| Campus Type: | Suburban |
| Colors: | Red, white, and navy |
| Nickname: | Eagles |
| Accreditation: | Western Association of Schools and Colleges |
| Newspaper: | The Omniscient Eagle |
| Yearbook: | Aerie |
Lancaster High School is a public, co-educational high school located in Lancaster, California, United States. Founded in 1995, it is the sixth oldest comprehensive high school in the Antelope Valley Union High School District.
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. The incident also prompted a lockdown at West Wind Elementary School on 36th Street West. It also prompted Antelope Valley College to cancel a previously scheduled evacuation drill. The campus remained open.[2]