The 1998 NCAA Men's Division I 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 12, 1998, and ended with the championship game on March 30 at the Alamodome in San Antonio, Texas. A total of 63 games were played.
Kentucky, coached by Tubby Smith, won the national title with a 78–69 victory in the final game over Utah, coached by Rick Majerus. Jeff Sheppard of Kentucky was named the tournament's Most Outstanding Player. Kentucky came back from double-digit deficits in each of its last three games in the tournament, leading to the school's fans dubbing the team the "Comeback Cats". This was Kentucky's third straight championship game appearance.