The 1998 NCAA Division III football season, part of the college football season organized by the NCAA at the Division III level in the United States, began in August 1998, and concluded with the NCAA Division III Football Championship, also known as the Stagg Bowl, in December 1998 at Salem Football Stadium in Salem, Virginia. The Mount Union Purple Raiders won their fourth, and third consecutive, Division III championship by defeating the Rowan Profs, 44−24.
The Gagliardi Trophy, given to the most outstanding player in Division III football, was awarded to Scott Hvistendahl, wide receiver and punter from Augsburg.
The 1998 NCAA Division III Football Championship playoffs were the 26th annual single-elimination tournament to determine the national champion of men's NCAA Division III college football. The championship Stagg Bowl game was held at Salem Football Stadium in Salem, Virginia for the second time. As of 2014, Salem has remained the yearly host of the Stagg Bowl. This was the final bracket to feature sixteen teams before expanding to 28 teams in 1999.