John McKenzie (born c. 1963) is a former American football player and coach. He is the head football coach at Kemper County High School in De Kalb, Mississippi, a position he has held since 2018. He served as the head football coach at Delaware State University from 1997 to 1999, compiling a record of 7–26. A native of Miami, Florida, McKenzie played college football as a quarterback at Jackson State University.