| Year: | 2020–21 |
| Prev Year: | 2019–20 |
| Next Year: | 2021–22 |
| Team: | Wagner Seahawks |
| Sport: | basketball |
| Conference: | Northeast Conference |
| Short Conf: | NEC |
| Record: | 13–7 |
| Conf Record: | 13–5 |
| Head Coach: | Bashir Mason |
| Hc Year: | 9th |
| Asst Coach1: | Donald Copeland |
| Asst Coach2: | Winston Smith |
| Asst Coach3: | Bobbyy Jordan |
| Stadium: | Spiro Sports Center |
| Champion: | NEC regular-season champions |
The 2020–21 Wagner Seahawks men's basketball team represented Wagner College during the 2020–21 NCAA Division I men's basketball season. The Seahawks were led by ninth-year head coach Bashir Mason. They played their home games at Spiro Sports Center on the school's Staten Island campus as members of the Northeast Conference (NEC).
The Seahawks finished the 2019–20 season 8–21, 5–13 in NEC play, to finish in tenth place. They failed to qualify for the NEC tournament.
|-!colspan=12 style=| Regular season |-!colspan=12 style=| NEC tournament|-|-Source:[1]