The 1991 Mr. Olympia contest was an IFBB professional bodybuilding competition held in September 14, 1991^[1] in Orlando, Florida. The score was tied after prejudging between Dorian Yates, in his Olympia debut, and defending champ Lee Haney. Haney went on to win the contest by three points.^[2] It was Haney's eighth Mr. Olympia win,^[3] at the time setting the record for most Mr. Olympia wins until Ronnie Coleman tied his record in 2005. Haney retired afterwards at 31.

The total prize money awarded was $250,000.

Place	Prize	Name
1	$100,000	Lee Haney[4]
2	$50,000	Dorian Yates
3	$30,000	Vince Taylor
4	$25,000	Lee Labrada
5	$15,000	Shawn Ray
6	$12,000	Sonny Schmidt
7	$8,000	Francis Benfatto
8	$7,000	Thierry Pastel
9	$6,000	Achim Albrecht
10	$5,000	Rich Gaspari
11		Ron Love
12		Bob Paris
13		Robby Robinson
14		Renel Janvier
15		Nimrod King
16		Samir Bannout
16		Albert Beckles
16		Geir Borgan Paulsen
16		Joseph Dawson
16		Frank Hillebrand
16		Pavol Jablonický
16		J.J. Marsh
16		Mike Matarazzo
16		Andreas Münzer
16		Miloš Šarčev
16		Tom Terwilliger

• Lee Haney won his eighth and final Mr. Olympia title, announces his retirement

• Mr. Olympia
• 1991 Mr. Olympia Top Six Posedown
• The 1991 Mr. Olympia