The Dirty Dozen Brass Band is an American brass band based in New Orleans, Louisiana. The ensemble was established in 1977, by Benny Jones and members of the Tornado Brass Band. The Dirty Dozen incorporated funk and bebop into the traditional New Orleans jazz style, and has since been a major influence on local music. They won the Grammy Award for Best American Roots Performance in 2023.

A brass band is a musical ensemble generally consisting primarily of brass instruments, most often with a percussion section. Ensembles that include brass and woodwind instruments can in certain traditions also be termed brass bands, but may be more correctly termed military bands, concert bands, or "brass and reed" bands.