Ken Hanna was an American jazz arranger and composer known for his sophisticated big band charts. Emerging in the mid-20th century, Hanna crafted arrangements that blended intricate harmonies with propulsive swing rhythms, contributing to the evolving sound of the era's large ensembles. His work, though perhaps not voluminous, demonstrated a keen understanding of orchestral color and melodic development, leaving a distinct mark on the jazz repertoire.