Montford Johnson Wagner (born March 23, 1980) is an American professional golfer who plays on the PGA Tour.

Wagner was born in Amarillo, Texas and grew up in upstate New York, where his father taught computer sciences at the United States Military Academy at West Point.

On February 27, 2011, he won the Mayakoba Golf Classic at Riviera Maya-Cancun in a playoff over Spencer Levin with a par on the first hole and regained his Tour card through 2013.

Johnson won the first full-field event of 2012, the Sony Open in Hawaii,[8] and extended his Tour privileges through 2014.

Having lost his full playing privileges, Wagner earned entry as a sponsor exemption for the 2015 Shell Houston Open.