The Robert E. Hendrickson High School Band consists of five concert bands, two winter guards, winter percussion, jazz band, and the Hawk Marching Band.  The Hendrickson Winter Guards are eight-time TCGC State Champions, and Hendrickson Winter Percussion finished 3rd at the TCGC State Championships in 2018. Also in 2018, there were ten TMEA All-State musicians from Hendrickson, the most in the band's history. Student enrollment for the 2018-2019 school year is approximately 300 members.

The Hendrickson Hawk Marching Band is a consistent winner of the UIL Sweepstakes award, and has advanced to the UIL 6A State Marching Contest and the Bands of America Super Regional Finals in 2016 & 2017. In 2016, the Hawk Band also performed in the Macy's Thanksgiving Day Parade for millions of viewers.