Dennis Wayne Harrah (born March 9, 1953) is an American former professional football player who was an offensive lineman for 13 seasons with the Los Angeles Rams of the National Football League (NFL).

Harrah was a 1974 All-American selection by NEA and TSN, Time magazine as a tackle.

Harrah was selected eleventh overall by the Los Angeles Rams in the 1975 NFL draft.

He served as team captain for six years and played in the Pro Bowl six times.

As a rookie in 1975, Harrah backed up starter Joe Scibelli and played on special teams.