Keith Cromwell (born September 7, 1979) is a lacrosse player from the United States. As of 2008 he is a member of the Minnesota Swarm in the National Lacrosse League and of the Long Island Lizards of Major League Lacrosse. He plays the attack position. He graduated from Rutgers University in 2001. Cromwell was also hired in 2007 by Manhasset High School as the Boys Varsity Lacrosse Offensive Coordinator.