The 1988–89 Kansas State Wildcats men's basketball team represented Kansas State University as a member of the Big 8 Conference during the 1988–89 NCAA Division I men's basketball season.
The head coach was Lon Kruger who was in his third of four years at the helm of his alma mater.
The Wildcats finished with a record of 19–11 (8–6 Big 8), and received an at-large bid to the NCAA tournament as No.
The team played its home games at Bramlage Coliseum in Manhattan, Kansas.
Kansas State defeated Purdue, 81–77, in the first game played at Bramlage Coliseum.