Harlon T. Barnett (born January 2, 1967) is an American football coach and former player. He is currently the co-defensive coordinator and associate head coach at Michigan State University under head coach Mark Dantonio. Barnett played professionally in the National Football League (NFL) as a safety for seven seasons with the Cleveland Browns, New England Patriots, and Minnesota Vikings.
Barnett was one of two players (the other is Myron Guyton) that Barry Sanders eluded in a twisting run in 1994 while Barnett was on the Patriots. Despite this, Barnett's 1994 season saw personal highs as he intercepted three passes and forced two fumbles. In his career, Barnett had four interceptions, all with New England. His lone kickoff return came with Cleveland in 1990 and went for 15 yards.