Mucca Pazza is an interdisciplinary instrumental music and performance ensemble based in Chicago, USA.

Mucca Pazza consists of approximately thirty active members and performs instrumental music; their mode of performance is informed by physical theater. Mucca Pazza’s instrumentation is loosely based on that of a traditional American marching band - drumline, sousaphone, trombones, trumpets, saxophones - but also includes electric guitar, mandolin, violin, cello, accordion, and cheerleaders. Their sound references American marching band and big band traditions, as well as Middle Eastern music, California surf, Ennio Morricone, and 50s television show themes. They perform in mismatched marching band uniforms, and are known for their energetic performances.

Their debut album, A Little Marching Band, was released in 2006. Their second full-length album, Plays Well Together, was released in June 2008. The band's song "Borino Oro" was featured in a season 4 episode of the Showtime television show Weeds, and the songs "Tube Sock Tango" and "St. Fresca's Regret" were used in Season 1, Episode 8 of Amazon'sTransparent. Their third album "Safety Fifth" was released in July, 2012 and a fourth full-length, "L.Y.A." was released in October 2014.