The 1998 Tulane Green Wave football team represented Tulane University in the 1998 college football season. The Green Wave finished with a record of 12 wins and no losses, one of only two NCAA Division 1-A teams to complete the season undefeated, the other being the BCS champion Tennessee Volunteers. The Green Wave won all of their games by six points or more. The combined 538 points set a single-season school record.