St. Martin High School is a suburban public high school located in the unincorporated community of St. Martin, Mississippi, United States, with an Ocean Springs postal address.

Its athletics department consists of Football, Track, Swimming, Cross Country, Softball, Soccer, Volleyball, Basketball, Tennis, Archery, Bowling, Baseball, and Wrestling.

St. Martin High School hosts various activities for its students to take part in.

St. Martin High School is also home to a branch of the Air Force Junior Reserve Officers' Training Corps, a program shared with Vancleave High School that is hosted at St. Martin.

The St. Martin High School faculty consists of the administration, counselors, support staff, and teachers.