Long Beach Polytechnic High School, founded in 1895 as Long Beach High School, is a public high school located at 1600 Atlantic Avenue in Long Beach, California, United States. The school serves portions of Long Beach, including Bixby Knolls, and some parts of the cities of Signal Hill and Lakewood. Polytechnic, (more commonly known as Poly), is the flagship high school of the Long Beach Unified School District. It is a large urban high school with just over 5,000 students.