The 2019 San Diego State Aztecs football team represented San Diego State University in the 2019 NCAA Division I FBS football season.

The Aztecs were led by ninth year head coach Rocky Long and played their final home games at SDCCU Stadium.

Mountain West Media Days were held on July 23–24 at the Cosmopolitan at the Las Vegas Strip.

The preseason poll was released at the Mountain West media days on July 23, 2019.

The Aztecs were predicted to finish in second place in the MW West Division.