Abbreviation for the Western Athletic Conference, a collegiate athletic conference in the United States comprised of (as of 2009), Boise State, Fresno State, University of Hawaii, University of Idaho, Louisiana Tech, University of Nevada, New Mexico State, San Jose State, and Utah State.

Formed as a power conference in 1962, all six of its founding members are now members of either the PAC-10 or the Mountain West Conference. Current membership has been relatively stable since 1996, with the top portion of the WAC dominating the national college scene, with the Boise State Broncos and Hawai'i Warriors gaining national football recognition, while the Nevada Wolfpack, Utah State Aggies, and New Mexico State Aggies have been doing the same with NCAA Division I Basketball.

Nicknames for all sports teams are, respectively, the Boise State Broncos, Fresno State Bulldogs, Hawaii Warriors, Idaho Vandals, Louisiana Tech Bulldogs, Nevada Wolfpack, New Mexico State Aggies, San Jose Spartans, and Utah State Aggies.

See also, WAC-off.