Roswell High School (RHS) is a public high school in Roswell, Georgia, U.S.A. that opened in 1949. Like the city of Roswell, the school bears the name of Roswell King. King founded the cotton mill that would eventually be the economic backbone of Roswell for much of its early history. The school serves the entire city of Roswell west of Georgia 400 and the city of Mountain Park. It also serves small portions of Alpharetta and Milton. With a population of over of 2,436 students in the 2007–2008 school year, RHS is one of the largest schools in the Fulton County School System. It is 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.
Roswell's standardized testing scores have exceeded the national and state averages and it has been named a national and Georgia school of excellence. For the 2005–2006 school year, Roswell's average SAT score was 1663 with the new SAT scoring system, which ranked Roswell third in the Fulton County School System and sixth in Metro Atlanta. The school offers students many extracurricular activities, including a variety of clubs. Students also have the option to compete in 16 different sports comprising 23 varsity level teams. Seven of the Roswell Hornet teams have won state championships, totaling 19 overall.