1973 NCAA University Division basketball tournament

The 1973 NCAA University Division basketball tournament involved 25 schools playing in single-elimination play to determine the national champion of men's NCAA University Division (now Division I, created later in 1973) college basketball. It began on Saturday, March 10, and ended with the championship game on Monday, March 26, in St. Louis, Missouri. A total of 29 games were played, including a third-place game in each region and a national third-place game.

Led by longtime head coach John Wooden, the UCLA Bruins won their seventh consecutive national title with an 87–66 victory in the final game over Memphis State, coached by Gene Bartow, a future head coach at UCLA. Junior center Bill Walton of UCLA was named the tournament's Most Outstanding Player.

This was the first year that the championship game was held on a Monday night, with Saturday semifinals. Previously, the championship game was on Saturday, with the semifinals on either Thursday or Friday. Also, this was the first year matchups in the semifinals rotated; previously, it was East vs. Mideast and West vs. Midwest every year.

Tournament notes
The UCLA–Memphis State championship game made USA Today′s 2002 list of the greatest NCAA tournament games of all time at #18. Bill Walton set a championship game record, hitting 21 of 22 shots and scoring 44 points.

This tournament marked the first appearance of Bob Knight as coach of Indiana University.

The participation for this tournament, as well as the previous tournament, for Southwestern Louisiana (now the University of Louisiana at Lafayette) was vacated on August 5, 1973, when the NCAA Committee on Infractions ruled the university guilty of over 100 violations, including impermissible benefits and doctoring high school transcripts of players. USL's program was shut down for the 1973–74 and 1974–75 seasons, all other Ragin Cajun' athletic programs were placed on three years' probation and banned from postseason participation, and the university was stripped of voting rights at the NCAA convention until 1977 (the NCAA originally planned to expel USL from the organization, but that sanction was downgraded in January 1974).

Schedule and venues
The following are the sites that were selected to host each round of the 1973 tournament:

First round
 * March 10
 * East Region
 * Alumni Hall, Jamaica, New York (Host: St. John's University)
 * The Palestra, Philadelphia, Pennsylvania (Hosts: University of Pennsylvania, Ivy League)
 * William & Mary Hall, Williamsburg, Virginia (Host: The College of William & Mary)
 * Mideast Region
 * University of Dayton Arena, Dayton, Ohio (Host: University of Dayton)
 * Midwest Region
 * Levitt Arena, Wichita, Kansas (Host: Wichita State University)
 * West Region
 * Dee Glen Smith Spectrum, Logan, Utah (Host: Utah State University)

Regional semifinals, 3rd-place games, and finals (Sweet Sixteen and Elite Eight)
 * March 15 and 17
 * East Regional, Charlotte Coliseum, Charlotte, North Carolina (Host: University of North Carolina at Charlotte)
 * Mideast Regional, Memorial Gymnasium, Nashville, Tennessee (Host: Vanderbilt University)
 * Midwest Regional, Hofheinz Pavilion, Houston, Texas (Hosts: University of Houston, Southwest Conference)
 * West Regional, Pauley Pavilion, Los Angeles, California (Host: UCLA)

National semifinals, 3rd-place game, and championship (Final Four and championship)
 * March 24 and 26
 * St. Louis Arena, St. Louis, Missouri (Host: Missouri Valley Conference)

Bracket
* – Denotes overtime period

Aftermath
The 1973 NC State Wolfpack team averaged 93 points per game (ppg), led the nation in win margin (21.8 ppg), and posted a 27–0 record, but was ineligible for postseason play because of NCAA probation. David Thompson, a two-time national Player of the Year, and All-America Tom Burleson, led NC State to a 30–1 record the following season, losing only to seven-time defending champion UCLA. The Wolfpack avenged its only loss during the two-year period by defeating UCLA in the 1974 Final Four and winning the title.

Gene Bartow, the Memphis State coach, would be John Wooden's successor at UCLA after the 1974–1975 season.

The tournament marked the last appearance of the Oklahoma City Chiefs, whose 11 tournament appearances are the most among teams no longer in Division I. The school would transition to the NAIA in 1985.

Announcers
Curt Gowdy, Tom Hawkins, and Jim Simpson (Final Four only) - East Regional Final at Charlotte, North Carolina; Final Four at St. Louis, Missouri
 * Jim Simpson and Tom Hawkins - First Round at Logan, Utah (Long Beach State-Weber State)
 * Curt Gowdy and Bill Enis - First Round at Wichita, Kansas - (Louisiana-Houston)
 * Jim Simpson and Bill Enis - Mideast Regional Final from Dayton, Ohio