| Mode: | Basketball |
| Year: | 2020–21 |
| Team: | Grambling State Tigers |
| Conference: | Southwestern Athletic Conference |
| Short Conf: | SWAC |
| Record: | 11–11 |
| Conf Record: | 9–6 |
| Hc Year: | 4th |
| Asst Coach1: | Winston Hines |
| Asst Coach2: | Demetrius Moore |
| Asst Coach3: | Kyle Jones |
The 2020–21 Grambling State Tigers men's basketball team represented Grambling State University in the 2020–21 NCAA Division I men's basketball season. The Tigers, led by fourth-year head coach Donte Jackson, played their home games at the Fredrick C. Hobdy Assembly Center in Grambling, Louisiana as members of the Southwestern Athletic Conference (SWAC).
The Tigers finished the 2019–20 season 17–15, 11–7 in SWAC play, to finish in a three-way tie for fourth place. They lost in the quarterfinals of the SWAC tournament to Texas Southern.[1]
|-!colspan=12 style=| Non-conference regular season|-!colspan=12 style=| SWAC regular season|-!colspan=12 style=| SWAC tournament|-|-Sources:[2] [3]