Shawnee Mission East High School was established in 1958 in order to serve the growing population of northeast Johnson County, Kansas.

[8] Shawnee Mission East is a member of the Kansas State High School Activities Association and offers a variety of sports programs.

Extracurricular activities are also offered in the form of performing arts, school publications, and clubs.

Shawnee Mission East High School was established in 1958 to serve the growing population of northeast Johnson County.

The Lancers compete in the Sunflower League and are classified as a 6A, the largest classification in Kansas according to the KSHSAA.