The Terrell High School Band is composed of over 200 students grades 9 - 12. The high school band program is multifaceted musical performance program in concert and visual activities. The Tiger Marching Band is comprised of 140 performers, performs at all varsity football games, and has a competitive marching season in October and November. The concert band program is comprised of two performing ensembles, including a Jazz Band and Percussion Ensemble.
In addition to these musical ensembles the program has established a colorguard program for grades
7-12. In the program's inaugural year, 50 Terrell High School students were enrolled. The program participates in the North Texas Colorguard Circuit in the spring.