The 1998–99 Princeton Tigers men's basketball team represented the Princeton University in intercollegiate college basketball during the 1998–99 NCAA Division I men's basketball season. The head coach was Bill Carmody and the team co-captains were Brian Earl and . The team played its home games in the Jadwin Gymnasium on the University campus in Princeton, New Jersey, and was the runner-up of the Ivy League. The team earned an invitation to the 32-team 1999 National Invitation Tournament.