The 1998 NCAA Division III Men's Basketball Tournament was the 24th annual single-elimination tournament to determine the national champions of National Collegiate Athletic Association (NCAA) men's Division III collegiate basketball in the United States. The field contained sixty-four teams, and each program was allocated to one of four sectionals. All sectional games were played on campus sites, while the national semifinals, third-place final, and championship finals were contested at the Salem Civic Center in Salem, Virginia. , also from Platteville, was named Most Outstanding Player.