The 2018–19 Oregon Ducks men's basketball team represented the University of Oregon during the 2018–19 NCAA Division I men's basketball season. The Ducks, led by ninth-year head coach Dana Altman, played their home games at Matthew Knight Arena as members of the Pac–12 Conference. They finished the season with a 25-13 record, 10-8 in conference play, and finished tied for 4th in the Pac-12. Oregon won the Pac-12 tournament, upsetting the No. 1 seed Washington and receiving the conference's automatic bid to the NCAA tournament. Oregon entered the NCAA Tournament as a No. 12 seed and upset the No. 5 seed Wisconsin in the first round, beat UC Irvine in the Second Round before losing in the Sweet Sixteen to Virginia.