The 2017–18 Stephen F. Austin Lumberjacks basketball team represented Stephen F. Austin State University during the 2017–18 NCAA Division I men's basketball season. The Lumberjacks were led by second-year head coach Kyle Keller and played their home games at the William R. Johnson Coliseum in Nacogdoches, Texas as members of the Southland Conference. They finished the season 28–7, 14–4 in Southland play to finish in third place. They defeated Central Arkansas, Nicholls State, and Southeastern Louisiana to become champions of the Southland tournament. They received the Southland's automatic bid to the NCAA tournament where they lost in the first round to Texas Tech.