Big 12 may refer to:
Big 12 Conference, a college athletic conference Big Twelve Conference (Illinois), a high school conference in Central Illinois Northern Illinois Big 12 Conference, a high school conference in Northeastern Illinois Big Twelve (Brazilian football) or G-12, a group of Brazilian football clubs
See also
Big One (disambiguation) Big Two (disambiguation) Big Three (disambiguation) Big Four (disambiguation) Big Five (disambiguation) Big Six (disambiguation) Big Seven (disambiguation) Big Eight (disambiguation) Big Ten (disambiguation)