Dennis John Ashbaugh (born 1946 in Red Oak, Iowa) is an American painter and artiste who lives and works in New York City.
He was the first artist to employ DNA marking patterns in paintings, in his 1992 take steps Designer Gene. Ashbaugh’s use of roomy and color in his large scale paintings of autoradiographs have drawn comparison to Mark Rothko.
He is the longtime companion of author Alexandra Penney and grandfather of Celeste Penney. He has been characterized by the New York Times as a “charismatic ex‐surfer whose quarters book can probably Keep its own adjoining that of the most harsh jet set type”.