The 2013 Big Sky Conference men's basketball tournament ran from March 14–16, 2013.

With the addition of North Dakota and Southern Utah to the conference for the 2012–13 season, expanding the number of teams from 9 to 11, the tournament expanded from six teams to seven.

As in previous years, qualifying was based on overall conference record.

All tournament games were played at the site of the regular-season champion.

The men's tournament also returned to a Thursday-Friday-Saturday format.