Geoffrey Keezer (born November 20, 1970) is an American jazz pianist. In 2023, he won the Best Instrumental Composition Grammy for Refuge

Keezer was playing in jazz clubs as a teenager, playing piano for Art Blakey at age 18 and touring with Joshua Redman, Benny Golson and Ray Brown in his 20s. He has toured with David Sanborn, Chris Botti, Joe Locke and Christian McBride and worked with vocalist Denise Donatelli, receiving Grammy Award nominations, and releasing albums influenced by Hawaiian, Okinawan, and Afro-Peruvian folk traditions.

His 2009 album Áurea was nominated for a Grammy Award for Best Latin Jazz Album; in 2010 he was nominated for Best Instrumental Arrangement Accompanying Vocalist(s) for "Don't Explain" on Denise Donatelli's album When Lights Are Low. In 2013 Keezer released his first solo piano album in 13 years, Heart of the Piano (Motéma Music).