William R. Loeffler (born August 9, 1956) is an American professional golfer.

[1] He played college golf at Arizona State University where he won twice[2] and was an All-American in 1977.

He subsequently won the 1986 U.S. Mid-Amateur title and was a member of the winning 1987 Walker Cup team.

He has played in four Senior PGA Championship tournaments, including the 2010 event at Colorado Golf Club in Parker, Colorado where he tied for 56th after going into the final round tied for 30th.

[7] Loeffler is the former owner and operator of the Links at Highlands Ranch, a par-62 executive golf course.