Redlands High School (RHS) is a high school located in Redlands, California.

It is the oldest Californian public high school still functioning on its original site.

[2] Also known as Redlands Union High School or Redlands Senior High School, RHS was originally built in 1891 as a "unified high school", formed from elementary districts of Redlands, Crafton and Lugonia.

The Girls' Gymnasium was completed as a New Deal Era project by the Public Works Administration in 1936.

[4] Located on 65 acres, the campus is divided by a major thoroughfare into South Campus (the original site) and North Campus.