The 2018 San Diego State Aztecs football team represented San Diego State University in the 2018 NCAA Division I FBS football season. The Aztecs were led by eighth-year head coach Rocky Long and played their home games at SDCCU Stadium. San Diego State was a member of the Mountain West Conference in the West Division. They finished the season 7–6, 4–4 in Mountain West play to finish in fourth place in the West Division. They were invited to the Frisco Bowl where they lost to Ohio.