The 2017–18 Nicholls State Colonels men's basketball team represented Nicholls State University during the 2017–18 NCAA Division I men's basketball season. The Colonels, led by second-year head coach Richie Riley, played their home games at Stopher Gym in Thibodaux, Louisiana as members of the Southland Conference. They finished the season 21–11, 15–3 in Southland play to earn a share of the regular season championship. As the No. 2 seed in the Southland tournament, they lost in the semifinals to Stephen F. Austin.