| Mode: | Basketball |
| Sex: | none |
| Year: | 2020–21 |
| Team: | UNLV Runnin' Rebels |
| Conference: | Mountain West Conference |
| Short Conf: | MW |
| Record: | 12–15 |
| Conf Record: | 8–10 |
| Head Coach: | T. J. Otzelberger |
| Hc Year: | 2nd |
| Asst Coach1: | Tim Buckley |
| Asst Coach2: | Kevin Kruger |
| Asst Coach3: | DeMarlo Slocum |
| Stadium: | Thomas & Mack Center |
The 2020–21 UNLV Runnin' Rebels basketball team represented the University of Nevada, Las Vegas during the 2020–21 NCAA Division I men's basketball season. The Runnin' Rebels were led by second-year head coach T. J. Otzelberger and played their home games at the Thomas & Mack Center in Paradise, Nevada as members of the Mountain West Conference.
The Runnin' Rebels finished the 2019–20 season 17–15, 12–6 in Mountain West play to finish in a three-way tie for second place. They lost in the quarterfinals of the Mountain West tournament to Boise State.
|-!colspan=9 style=| Regular season|-!colspan=9 style=| Mountain West tournamentSource[1]