| Mode: | Basketball |
| Sex: | none |
| Year: | 2020–21 |
| Prev Year: | 2019–20 |
| Next Year: | 2021–22 |
| Team: | Stephen F. Austin Lumberjacks |
| Conference: | Southland Conference |
| Short Conf: | Southland |
| Record: | 16–5 |
| Conf Record: | 12–3 |
| Hc Year: | 5th |
| Asst Coach1: | Jeremy Cox |
| Asst Coach2: | Wade Mason |
| Asst Coach3: | Mitch Vanya |
| Stadium: | William R. Johnson Coliseum (Capacity: 7,203) |
The 2020–21 Stephen F. Austin Lumberjacks basketball team represented Stephen F. Austin State University (SFA) during the 2020–21 NCAA Division I men's basketball season. The Lumberjacks, led by fifth-year head coach Kyle Keller, played home games at the William R. Johnson Coliseum in Nacogdoches, Texas. This season was the Lumberjacks' last as members of the Southland Conference; SFA is one of four schools, all from Texas, that will leave the Southland in July 2021 to join the Western Athletic Conference.[1]
The 2019–20 Stephen F. Austin Lumberjacks basketball team finished the season 28–3, 19–1 in Southland play to win the Southland regular season championship. As the No. 1 seed, they received a double-bye to the semifinals of the Southland tournament, however, the tournament was cancelled amid the COVID-19 pandemic. With the Southland tournament's cancellation, they were awarded the Southland's automatic bid to the NCAA tournament, however, the NCAA tournament was also cancelled due to the same outbreak.
|-!colspan=12 style=| Non-conference Regular season|-!colspan=12 style=| Southland Regular seasonSource:[2]