The 2010–13 Western Athletic Conference realignment refers to the Western Athletic Conference (WAC) dealing with several proposed and actual conference expansion and reduction plans among various NCAA conferences and institutions from 2010 to 2013. Moves involving the WAC were a significant part of a much larger NCAA conference realignment in which it was one of the most impacted conferences. Of the nine members of the WAC in 2010, only two—the University of Idaho and New Mexico State University—remained in the conference beyond the 2012–13 school year, and Idaho departed for the Big Sky Conference after the 2013–14 school year. Five pre-2010 members are now all-sports members of the Mountain West Conference (MW), and another joined the MW for football only while placing most of its other