The 2018–19 Colorado State Rams men's basketball team represented Colorado State University during the 2018–19 NCAA Division I men's basketball season. The team was coached by Niko Medved in his first season. The Rams played their home games at Moby Arena on CSU's main campus in Fort Collins, Colorado as members of the Mountain West Conference. They finished the season 12–20, 7–11 in Mountain West play to finish in a three-way tie for seventh place. They lost in the first round of the Mountain West tournament to Boise State.