Flathead High School is an American public secondary school located in Kalispell, Montana. The school has been International Baccalaureate certified since 2004. It is one of two high schools in School District #5. Other schools in District #5 include: Russell, Edgerton, Peterson, Hedges and Elrod (K-5); Kalispell Middle School (6-8); and Glacier High School (9-12).