2003–04 BYU Cougars men's basketball team

The 2003–04 BYU Cougars men's basketball team represented Brigham Young University as a member of the Mountain West Conference during the 2003–04 season. Led by head coach Steve Cleveland, the Cougars finished second in the Mountain West Conference regular season standings. The team received an at-large bid to the NCAA tournament – their third bid in four years under Cleveland. BYU finished the season with a 21–9 record (10–4 MWC).

Schedule and results
!colspan=9 style=| Regular Season

!colspan=9 style=| MWC tournament

!colspan=9 style=| NCAA tournament

Awards and honors

 * Rafael Araújo – MWC co-Player of the Year