The 1998–99 Georgetown Hoyas men's basketball team represented Georgetown University in the 1998–99 NCAA Division I college basketball season. They were coached by John Thompson, in his 27th season as head coach until January 8, 1999, when he resigned and Craig Esherick succeeded him. The Hoyas played most of their home games at the MCI Center in Washington, DC, although they played one home game at McDonough Gymnasium on the Georgetown campus. They were members of the Big East Conference and finished the season 15–16, 6–12 in Big East play. They advanced to the quarterfinals of the 1999 Big East Men's Basketball Tournament before losing to Miami. Not invited to the NCAA Men's Division I Basketball Tournament for the second year in a row, they instead appeared in the 1999 National Invitati