The Galesburg High School Marching Band, also known as the “Marching Streaks,” compete in yearly competitions. In 2019, the band had a Finalist appearance at Illinois States Marching Band Championships and was the Division 4A Champion at the University of Illinois Marching Band Championship, according to IL Marching Online. The school also host 2 concert bands (Symphonic Band and Wind Symphony), Two pep bands (Silver and Gold), two jazz bands (Silver and Gold), and winter percussion as well as winter color guard. The bands director is Mr. Andrew Empey.