1991 NCAA Division I men's basketball tournament

1991 NCAA Division I
men's basketball tournament

Season	1990–91
Teams	64
Finals site	Hoosier Dome Indianapolis, Indiana
Champions	Duke Blue Devils (1st title, 5th title game, 9th Final Four)
Runner-up	Kansas Jayhawks (6th title game, 9th Final Four)
Semifinalists	North Carolina Tar Heels (10th Final Four) UNLV Runnin' Rebels (4th Final Four)
Winning coach	Mike Krzyzewski (1st title)
MOP	Christian Laettner (Duke)
Attendance	665,707
Top scorer	Christian Laettner (Duke) (125 points)
NCAA Division I men's tournaments «1990 1992»

The 1991 NCAA Division I men's basketball tournament involved 64 schools playing in single-elimination play to determine the national champion of men's NCAA Division I college basketball. It began on March 14, 1991, and ended with the championship game on April 1 in Indianapolis, Indiana. A total of 63 games were played.

Duke, coached by Mike Krzyzewski, won a rematch of the previous year's national final matchup against undefeated UNLV 79–77 in the semifinal,^[1] then won the national title with a 72–65 victory in the final game over Kansas, coached by Roy Williams.^[2] This was the first national championship game for Williams as a head coach. Kansas defeated Williams' mentor Dean Smith and North Carolina (where Williams later coached) in the semifinal. Kansas made its second trip to the national championship game in four seasons, the prior appearance being 1988 when they defeated Oklahoma. Christian Laettner of Duke was named the tournament's Most Outstanding Player.

This tournament marked the first time a #15 seed upset a #2 seed since the tournament field expanded to 64 teams in 1985, when Richmond accomplished against Syracuse in the East region. In addition, for the first time ever, at least one team seeded #9 through #15 won a first-round game. This feat would be followed in 2013, 2016, and 2021.

This tournament adopted the NBA's 10ths-second timer during the final minute of each period in all arenas.