Named for the Revolutionary War major and first governor of Pennsylvania, Thomas Mifflin, it is located in Shillington, Berks County, Pennsylvania and serves students in the five communities of Shillington, Kenhorst, Mohnton, Cumru, and Brecknock.

As Shillington High School, it was notably attended by famed American author John Updike, as well as in the graduating class of 2022, Gatorade Football Player Of The Year Nicholas Singleton.

[5][6] Source:[8] The Governor Mifflin SGA is a student-run body that serves as the government of student affairs.

TSA is an Organization that seeks to empower students by exposing them to events in the engineering sphere as well as other creative disciplines.

Students compete in three competitive brackets to decide who is the ultimate Ping Pong champion.