Hammond High Magnet School, founded in 1866, is a public high school located in an unincorporated part of the 7th Ward of Tangipahoa Parish, Louisiana, United States, east of Hammond. It is the second-largest high school in the Tangipahoa Parish Public School System. Until the end of academic year 2010-11 it was known as Hammond High School but became Hammond Magnet High School on being so reconstituted and designated by the Tangipahoa Parish School System. The mascot is the Tornado, and the school colors are purple and white. As of the 2019-2020 school year, Hammond High's principal is Shelly Gaydos. The school enrolls students from Hammond and the surrounding area within Tangipahoa Parish because of the presence of the Magnet program and International Baccalaureate program.
Hammond's chief rival is the Ponchatoula Green Wave.
Originally located between East Thomas Street (US 190, then a two-way road) and Morris Street (the building became Eastside Elementary School and later the Eastside Apartments), the school moved to a location on the south side of West Morris Street (US 190, now eastbound only) shortly after World War I; the West Morris Street site is now the world headquarters of Neill Corporation. In the Morris Street location, although the vernacular name was Hammond High School, officially it was "Annie Eastman High School" in commemoration of a former teacher. In the late 1960s the school relocated to a site north of University Avenue (LA 3234)—now the North Campus of Southeastern Louisiana University. From there Hammond High moved to its current location on LA 1064 (River Road).
Linus A. Sims (1882-1949) was appointed the principal of Hammond High School in 1923. Two years later, he started Hammond Junior College in a wing of the high school, then on the south side of West Morris Street. In 1928, the junior college, under Sims's leadership, became the future Southeastern Louisiana University (then College).
All students are required to wear school uniforms.