The 1997–98 Oklahoma State Cowboys basketball team represented Oklahoma State University as a member of the Big 12 Conference during the 1997–98 NCAA Division I men's basketball season. They were led by 8th-year head coach Eddie Sutton and played their home games at Gallagher-Iba Arena in Stillwater, Oklahoma. They finished the season 22–7, 11–5 in Big 12 play to finish in a tie for second place. The Cowboys lost to Texas in the quarterfinals of the Big 12 tournament. The team received an at-large bid to the NCAA tournament as the No. 8 seed in the Southeast region. Oklahoma State defeated George Washington in the opening round before losing to No. 1 seed Duke in the second round.