The 1984 NCAA Men's Division I Basketball Tournament involved 53 schools playing in single-elimination play to determine the national champion of men's NCAA Division I college basketball. It began on March 2, 1984, and ended with the championship game on April 2 in Seattle, Washington. A total of 52 games were played. This was the last tournament in which some teams earned first round byes as the field expanded to 64 teams beginning in the 1985 field when each team played in the first round.
Georgetown, coached by John Thompson, won the national title with a 84–75 victory in the final game over Houston, coached by Guy Lewis. Patrick Ewing of Georgetown was named the tournament's Most Outstanding Player. Thompson became the first African American head coach to lead his team to the title.