| Mode: | Basketball |
| Year: | 2008–09 |
| Prev Year: | 2007–08 |
| Next Year: | 2009–10 |
| Team: | San Diego State Aztecs |
| Conference: | Mountain West Conference |
| Short Conf: | Mountain West |
| Record: | 26 - 10 |
| Conf Record: | 11 - 5 |
| Hc Year: | 10th |
| Champion: | Great Alaska Shootout Champions |
| Tourney: | NIT |
| Tourney Result: | Semifinals |
The 2008–09 San Diego State men's basketball team represented San Diego State University in the 2008–09 college basketball season. This was head coach Steve Fisher's tenth season at San Diego State. The Aztecs competed in the Mountain West Conference and played their home games at the Viejas Arena.
Source[1]
|-!colspan=9 style=| Exhibition|-!colspan=9 style=| Regular Season|-!colspan=10 style=| Mountain West tournament|-!colspan=10 style=| National Invitation Tournament