The 1990 San Diego State Aztecs football team represented San Diego State University during the 1990 NCAA Division I-A football season as a member of the Western Athletic Conference (WAC). The team was led by head coach Al Luginbill, in his second year. They played home games at Jack Murphy Stadium in San Diego. They finished the season with a record of six wins, five losses (6–5, 5–2 WAC).