Stephen Tyng Mather High School is a public 4–year high school located in the West Ridge neighborhood on the north side of Chicago, Illinois, United States. Opened in 1959, Mather is operated by the Chicago Public Schools (CPS) district. Mather is named in honor of Stephen Mather, an industrialist and conservationist who became the first director of the National Park Service.

West Ridge is one of 77 Chicago community areas. It is a middle-class neighborhood located on the far North Side of the City of Chicago. It is located in the 50th ward and the 40th ward.