Robert J. Lunn (born April 24, 1945) is an American professional golfer who played on the PGA Tour in the 1960s and 1970s.

In 1965, Lunn turned pro and won six times on the PGA Tour.

He earned $102,711 and finished 11th on the money list that year after winning two tournaments in a row – the Memphis Open Invitational and the Atlanta Classic.

Lunn has played in just over four dozen events on the Champions Tour since turning 50 in 1995.

PGA Tour playoff record (2–0) Note: Lunn never played in The Open Championship.