The 1998 NAIA Division I women's basketball tournament was the tournament held by the NAIA to determine the national champion of women's college basketball among its Division I members in the United States and Canada for the 1997–98 basketball season.

In a rematch of the 1997 final, Union (TN) defeated four-time defending champions Southern Nazarene in the championship game, 73–70, to claim the Bulldogs' first NAIA national title.

The tournament was played at the Oman Arena in Jackson, Tennessee.

[1] The tournament field remained fixed at thirty-two teams, with the top sixteen teams receiving seeds.

The tournament continued to utilize a simple single-elimination format.