The 2013 NCAA Division I Men's Basketball Tournament was a single-elimination tournament that involved 68 teams playing to determine the national champion of men's NCAA Division I college basketball. It began on March 19, 2013, and concluded with the championship game on April 8, 2013, at the Georgia Dome in Atlanta. This was the 75th edition of the NCAA Men's Basketball Championship, dating to 1939.

Selection Sunday, when CBS announced the participants and tournament brackets, occurred on March 17, 2013.

The Final Four consisted of Louisville, making their second straight appearance, Wichita State, making their second ever appearance, Syracuse, making their first appearance since their 2003 national championship, and Michigan, returning for the first time since the Fab Five's second appearance in 1993 (which was later vacated). By winning the West Region, Wichita State became the first #9 seed and first Missouri Valley Conference (MVC) team to reach the Final Four since the tournament expanded to 64 teams in 1985. The last #9 seed to reach the Final Four was Penn, and the last MVC team to do so was Indiana State, both in 1979.

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