The 1998 NCAA Women's Division I Swimming and Diving Championships were contested at the 17th annual NCAA-sanctioned swim meet to determine the team and individual national champions of Division I women's collegiate swimming and diving in the United States. This year's events were hosted at the at the University of Minnesota in Minneapolis, Minnesota. Stanford topped the team standings, finishing 44 points ahead of Arizona. It was the Cardinal's record eighth national title and their sixth in seven seasons.