The 2021–22 Stephen F. Austin Lumberjacks basketball team represented Stephen F. Austin State University (SFA) during the 2021–22 NCAA Division I men's basketball season. The Lumberjacks, led by sixth-year head coach Kyle Keller, played their home games at the William R. Johnson Coliseum in Nacogdoches, Texas. This season was the Lumberjacks' first as members of the Western Athletic Conference; SFA was one of four schools, all from Texas, that left the Southland Conference in July 2021 joining the WAC.