The NCAA Division I men's basketball tournament, branded as March Madness, or The Big Dance, is a single-elimination tournament played in the United States to determine the men's college basketball national champion of the Division I level in the National Collegiate Athletic Association (NCAA). Played mostly during March, the tournament was first conducted in 1939 and currently consists of 76 teams. Known for its upsets of favored teams with its single game single-elimination format, it has become one of the most popular annual sporting events in the US.
The current 76-team format will begin with the next edition of the tournament in 2027; the tournament format had remained largely unchanged since 1985, when it expanded to 64 teams. Before then, the size of the field varied from as little as 8 teams to as many as 53. The field was restricted to conference champions until at-large bids were extended in 1975 and teams were not fully seeded until 1979. In 2020, the tournament was cancelled for the first time due to the COVID-19 pandemic and in the next season, the tournament was contested completely in the state of Indiana as a precaution.
37 schools have won the tournament. UCLA has the most with 11 championships and their coach John Wooden has the most titles of any coach with 10. The University of Kentucky (UK) has eight championships, the University of Connecticut (UConn) and the University of North Carolina have six championships, Duke University and Indiana University have five championships, the University of Kansas (KU) has four championships and the University of Florida and Villanova University have three titles. The University of Louisville has won three national championships but one has been vacated. Six other programs are tied with two national championships and 21 teams have won it once.
All tournament games are broadcast by CBS, TBS, TNT and truTV under the program name NCAA March Madness. With a contract through 2032, Paramount Skydance and Warner Bros. Discovery pay $891 million annually for the broadcast rights. The NCAA distributes revenue to participating teams based on how far they advance, which provides significant funding for college athletics. The tournament has become part of American popular culture through bracket contests that award money and other prizes for correctly predicting the outcomes of the most games. In 2023, Sports Illustrated reported that an estimated 60 to 100 million brackets are filled out each year.
History
Early era (1939–1970) The first tournament was held in 1939 and was won by Oregon. It was the idea of Ohio State coach Harold Olsen. The National Association of Basketball Coaches operated the first tournament for the NCAA.
From 1939 to 1950, the NCAA tournament consisted of eight teams, with each selected from a geographical district. Multiple conferences were considered part of each district, such as the Missouri Valley and the Big Seven conferences in one district and the Southern and Southeastern conferences in another, which often led to top-ranked teams being left out of the tournament. The issue came to a head in 1950, when the NCAA suggested that third-ranked Kentucky and fifth-ranked North Carolina State compete in a playoff game for a bid, but Kentucky refused, believing they should be given the bid as the higher-ranked team. In response, the NCAA doubled the field to 16 in 1951, adding two additional districts and six spots for at-large teams. Conferences could still only have one team in the tournament, but multiple conferences from the same geographic district could now be included through at-large bids. This development helped the NCAA compete with the National Invitation Tournament for prestige.
In the eight team format, the tournament was split into the East and West Regions, with champions meeting in the national championship game. The first two rounds for each region were conducted at the same site and the national championship and, from 1946, consolation game occurred a week later. Some years, the site of the national championship was the same site as a regional championship and in other years a new site. With the expansion to 16 teams, the tournament retained the original format of the national semifinals being the regional finals in 1951. For the 1952 tournament, there were four regions named East-1, East-2, West-1, West-2, all played at separate sites. The regional champions met for the national semifinals and championship at a separate location a week later, establishing the format with two final rounds of the tournament (although the name "Final Four" would not be used in branding until the 1980s).
The 1953 tournament expanded to include 22 teams and added a fifth round, with ten teams receiving a bye to the regional semifinals. The number of teams would fluctuate from 22 to 25 teams over the next two decades, but the number of rounds remained the same. The double region naming was kept until 1956, when the regions were named the East, Midwest, West, and Far West. In 1957, the regions were named East, Mideast, Midwest, and West, which remained until 1985. Regions were paired in the national semifinals based on their geographic locations, with the two eastern regions meeting in one semifinal and two western regions meeting in the other semifinal.
Beginning in 1946, a national third-place game was held before the championship game. Regional third-place games were played in the West from 1939 and the East from 1941. Despite expansion in 1951, there were still only two regions, each with a third-place game. The 1952 tournament had four regions each with a third-place game.
This era of the tournament was characterized by competition with the National Invitation Tournament. Founded by the Metropolitan Basketball Writers Association one year before the NCAA tournament, the NIT was held entirely in New York City at Madison Square Garden. Because New York was the center of the press in the United States, the NIT often received more coverage than the NCAA tournament in early years. Additionally, good teams were often excluded from the NCAA tournament because each conference could only have one bid and conference champions were even excluded because of the 8-district system before 1950. Teams often competed in both tournaments during the first decade, with City College of New York winning both the NIT and NCAA tournament in 1950. Soon after, the NCAA banned teams from participating in both tournaments.
Pre-modern era (1971–1984) Two major changes over the course of the early 1970s led to the NCAA becoming the preeminent post-season tournament for college basketball. First, the NCAA added a rule in 1971 that banned teams who declined an invitation to the NCAA tournament from participating in other post-season tournaments. This was in response to eighth-ranked Marquette declining its invitation in 1970 and instead participating in and winning the NIT after coach Al McGuire complained about their regional placement. Since then, the NCAA tournament has clearly been the major one, with conference champions and the majority of the top-ranked teams participating. Second, the NCAA allowed multiple teams per conference starting in 1975. This was in response to several highly ranked teams being denied bids during the early 1970s. These included South Carolina in 1970, which was undefeated in conference play but lost in the ACC tournament; second-ranked USC in 1971, which was left out because their conference was represented by top-ranked UCLA; and Maryland in 1974, which was ranked #3 but lost the ACC tournament championship game to eventual national champion North Carolina State.
To accommodate at-large bids, the tournament expanded in 1975 to include 32 teams, allowing a second team to represent a conference in addition to the conference champion, and eliminated byes. In 1979, the tournament expanded to 40 teams and added a sixth round; 24 teams received byes to the second round. Eight more teams were added in 1980 with only 16 teams receiving byes, and the restriction on the number of at-large bids from a conference was removed. In 1983, a seventh round with four play-in games was added; an additional play-in game was added in 1984. Beginning in 1973, the regional pairings for the national semifinals were rotated on a yearly basis instead of the two eastern and two western regions always playing.
Seeding also began during this era, adding drama and ensuring better teams had better paths to the Final Four. In 1978, teams were seeded in two separate pools based on their qualification method. Each region had four teams which automatically qualified ranked Q1–Q4 and four teams which received an at-large bid ranked L1–L4. In 1979, all teams in each region were seeded 1 through 10, without regards for their qualification method.
The national semifinals were moved to Saturday and the championship was moved to Monday evening in 1973, where they have remained since. Until then, the championship had been played on Saturday and the semifinals two days before.
The third-place games were eliminated during this era, with the last regional third-place games played in 1975 and the last national third-place game played in 1981.
Modern era (1985–present) In 1985, the tournament expanded to 64 teams, eliminating all byes and play-ins. For the first time, all teams had to win six games to win the tournament. This expansion led to increased media coverage and popularity in American culture. Until 2001, the First and Second Rounds occurred at two sites in each region.
In 1985, the Mideast Region was renamed the Southeast Region. In 1997, the Southeast Region became the South Region. From 2004 to 2006, the regions were named after their host cities, e.g. the Phoenix regional in 2004, the Chicago regional in 2005, and the Minneapolis regional in 2006, but reverted to the traditional geographic designations beginning in 2007. For the 2011 tournament, the South Region was the Southeast Region and the Midwest Region the Southwest Region; both returned to their previous names in 2012.
The 1996 Final Four was the last to take place in a venue built specifically for basketball. Since then, the Final Four has exclusively been played in large indoor football stadiums.
Beginning in 2001, the field was expanded from 64 to 65 teams, adding to the tournament what was informally known as the "play-in game". This was in response to the creation of the Mountain West Conference during 1999. Originally, the winner of the Mountain West's tournament did not receive an automatic bid, due to standard NCAA rules regarding new conferences and automatic bids. As an alternative to eliminating an at-large bid, the NCAA expanded the tournament to 65 teams. The #64 and #65 seeds were seeded in a regional bracket as 16 seeds, and then played the opening round game on the Tuesday preceding the first weekend of the tournament. This game was always played at the University of Dayton Arena in Dayton, Ohio.
Starting in 2004, the selection committee revealed the overall rankings among the #1 seeds. Based on these rankings, the regions were paired so that the #1 overall seed would play the #4 overall seed in a national semifinal if both teams made the Final Four. This was to prevent the top two teams from meeting before the finals, as was largely considered the case in 1996 when Kentucky played Massachusetts in the Final Four. Previously, regional pairings rotated yearly.