David Lynn Selby is an American film, television, and stage actor. He is best known for playing Quentin Collins on the daytime soap Dark Shadows (1968–71) and Richard Channing on the prime-time soap Falcon Crest (1982–90). Selby also had prominent roles in the television series Flamingo Road (1981–82) and the feature film Raise the Titanic (1980).

Quentin Collins is the name of several characters featured in the 1966–1971 ABC cult TV Gothic horror-soap opera Dark Shadows. Variations of the character have been played by actor David Selby.