George Colligan (born December 29, 1969) is an American jazz pianist, organist, drummer, trumpeter, educator, composer, and bandleader. Raised in Columbia, Maryland, he attended the Peabody Institute, majoring in classical trumpet and music education. In high school, he learned to play the drums and later switched to piano.  As a sideman, he has worked with Phil Woods, Gary Bartz, Robin Eubanks, Billy Higgins, Lee Konitz, Nicholas Payton, Steve Wilson, Richard Bona, Cassandra Wilson, Christian McBride, Buster Williams, Al Foster, Don Byron, Benny Golson, Lonnie Plaxico, and Vanessa Rubin. Colligan received a Chamber Music America Award for composition and won the Jazzconnect.com Award. He has released over twenty albums as a leader and has recorded on over 100 albums as a sideman.

In 2009, Colligan moved to Winnipeg to teach at the University of Manitoba. He taught jazz history, piano, drums, trumpet, and led master classes. He was songwriter-in-residence at Aqua Books from February to March 2011. In July 2011, Colligan moved to Portland, Oregon, to teach at Portland State University.