The 2012–13 San Diego State men's basketball team represented San Diego State University in the 2012–13 college basketball season.

This was head coach Steve Fisher's fourteenth season at San Diego State.

They finished with a record of 23–11 overall, 9–7 in Mountain West play for 3rd place tie with Boise State.

They lost in the semifinals in the 2013 Mountain West Conference men's basketball tournament to New Mexico.

They received an at-large bid in the 2013 NCAA Division I men's basketball tournament, in which they beat Oklahoma in the second round and lost in the third round to Florida Gulf Coast.