Roswell High School (RHS) is a public high school in Roswell, Georgia, United States which opened in 1949. It serves the entire city of Roswell west of Georgia State Route 400 and the city of Mountain Park, as well as small portions of Alpharetta and Milton. Roswell High School neighbors both Fellowship Christian School and Blessed Trinity Catholic High School. It is also the second oldest of Fulton County's schools in the northern portion of the county, opening between Milton High School (1921), and Chattahoochee High School (1991). Roswell is currently on its third campus, which opened in 1990. The current building is the oldest in-use high school building in north Fulton.