George S. Parker High School is a comprehensive public high school located on the west side of the city of Janesville, Wisconsin.

The school, named for George S. Parker, founder of the Parker Pen Company, is a part of the School District of Janesville and was constructed in 1967.

In Nov 2006, a referendum passed that provided nearly $71 million for updates and renovation to both Parker and Craig High Schools.

[7] The school sports teams compete in the Big Eight Conference.

State level competition is governed by the Wisconsin Interscholastic Athletic Association (WIAA).