Denison High School is a public high school in Denison, Texas, United States and classified as a 5A school by the University Interscholastic League (UIL).

It is part of the Denison Independent School District located in north central Grayson County.

[2] The Denison Yellow Jackets compete in these sports - [3] Volleyball, Cross Country, Football, Basketball, Powerlifting, Swimming, Soccer, Golf, Track, Tennis, Softball & Baseball.

William B. Hempkins led Denison for the first four years running as battle of the ax champions.

This is the longest continuous rivalry among all high schools in the state of Texas.