The 2018–19 Kansas State Wildcats men's basketball team represented Kansas State University in the 2018–19 NCAA Division I men's basketball season. Their head coach was Bruce Weber in his seventh year at the helm of the Wildcats. The team played its home games in Bramlage Coliseum in Manhattan, Kansas as members of the Big 12 Conference. They finished the season 25-9, to finish in first place. In the Big 12 tournament, they defeated TCU in the quarterfinals before losing to Iowa State in the semifinals. They received a at-large bid to the NCAA Tournament where they were upset by UC Irvine in the First Round.