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The 1955 NCAA basketball tournament involved 24 schools playing in single-elimination play to determine the national champion of men's NCAA Division Icollege basketball. It began on March 8, 1955, and ended with the championship game on March 19 in Kansas City, Missouri. A total of 28 games were played, including a third-place game in each region and a national third-place game.
The 1955 tournament saw a record eleven teams - Canisius, Duke, Iowa, Marquette, Memphis State, San Francisco, Southern Methodist, Tulsa, West Texas State, West Virginia and Williams College - make the tournament for the first time. This beat the record of ten teams set in 1953 (the first year which the tournament expanded to include a regional quarterfinal round), and would be beat in 1981 when 12 teams made the tournament.
Two teams in the field, West Texas State College (now known as West Texas A&M University) and Williams College of Williamstown, Massachusetts, are no longer in Division I. Neither team would make the tournament again; West Texas is now in Division II and Williams is in Division III. The NCAA would split into University and College Divisions in 1956, thus ending the chances for smaller teams such as these to make the tournament.