Stephen Tyng Mather High School (commonly known as simply Mather) is a public four-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.

The school has teachers fluent in languages such as Chinese, Arabic, Assyrian, Spanish, Russian, Serbo-Croat, Gujarati, and Urdu.

Mather competes in the Chicago Public League (CPL) and is a member of the Illinois High School Association (IHSA).

During the 2000–01 season, The girls' softball team were Class AA and public league champions.