James Gregory "Greg" Keelor (born August 29, 1954) is a Canadian singer-songwriter and musician. He is best known as a member of the band Blue Rodeo, where he shares song writing and vocal duties with Jim Cuddy. Keelor has also released three solo albums and appeared as a guest musician on albums by Crash Vegas and Melissa McClelland. He participated, along with Rick White and members of The Sadies, in the supergroup The Unintended.

Keelor is also a producer, having co-produced Blue Rodeo's Lost Together and solo-producing Cuff the Duke's albums Way Down Here and Morning Comes.