Horizon League Background Founded in 1979, the Horizon League, is an NCAA Division I athletics conference comprised of 11 member institutions with a combined enrollment of 140,000, including nine (9) member schools located in top-70 U.S. metropolitan populations. Members include: Cleveland State University, University of Detroit Mercy, IU Indianapolis, University of Wisconsin-Green Bay, University of Wisconsin-Milwaukee, Northern Kentucky University, Oakland University, Purdue University Fort Wayne, Robert Morris University, Wright State University, and Youngstown State University. Northern Illinois University will rejoin the Horizon League as its 12th member starting in the 2026-27 academic year. The League’s headquarters are in Indianapolis, Indiana and the League is an imp