The 1989 NCAA Division I men's basketball tournament involved 64 schools playing in single-elimination play to determine the national champion of men's NCAA Division I college basketball. It began on March 16, 1989, and ended with the championship game on April 3 in Seattle. A total of 63 games were played. Two 16-seeded teams came within one point of victory in the first round (Georgetown vs. Princeton, Oklahoma vs. East Tennessee State), and a third came within six points. This tournament was also unusual in that all four 11-seeds advanced out of the first round.