David J. Murphy (born November 26, 1954) is an American businessman and politician.
From Greenville, Wisconsin, Murphy is the owner of a fitness center and went to the University of Wisconsin–Fox Valley. In November 2012, Murphy was elected to the Wisconsin State Assembly as a Republican.
In December 2016, Murphy pressured the University of WisconsinâÂÂMadison to cancel a course entitled "The Problem of Whiteness" and fire the lecturer teaching it.