Occidental (Los Angeles, CA)
Southern California Intercollegiate Athletic Conference
States
Oglethorpe (Atlanta, GA)
Southern Athletic Association
Ohio (Athens, OH)
Mid-American Conference
Ohio Christian (Circleville, OH)
River States Conference
Ohio Dominican (Columbus, OH)
Great Midwest Athletic Conference
Ohio Northern (Ada, OH)
Ohio Athletic Conference
Ohio State (Columbus, OH)
Big 10 Conference
Ohio Valley (Vienna, WV)
Great Midwest Athletic Conference
Ohio Wesleyan (Delaware, OH)
North Coast Athletic Conference
Oklahoma (Norman, OK)
Big 12 Conference
Oklahoma Baptist (Shawnee, OK)
Great American Conference
Oklahoma Christian (Oklahoma City, OK)
Heartland Conference
Oklahoma City (Oklahoma City, OK)
Sooner Athletic Conference
Oklahoma Panhandle State (Goodwell, OK)
Sooner Athletic Conference
Oklahoma State (Stillwater, OK)
Big 12 Conference
Oklahoma Wesleyan (Bartlesville, OK)
Kansas Collegiate Athletic Conference
Old Dominion (Norfolk, VA)
Conference USA
Olive-Harvey College (Chicago, IL)
City Colleges of Chicago
Olivet (Olivet, MI)
Michigan Intercollegiate Athletic Association
Olivet Nazarene (Bourbonnais, IL)
Chicagoland Collegiate Athletic Conference
Oral Roberts University (Tulsa, OK)
Summit League
Oregon (Eugene, OR)
Pacific 12 Conference
Oregon State (Corvallis, OR)
Pacific 12 Conference
Oregon Tech (Klamath Falls, OR)
Cascade Collegiate Conference
Oswego State (Oswego, NY)
State University of New York Athletic Conference
Ottawa (Ottawa, KS)
Kansas Collegiate Athletic Conference
Ottawa Arizona (Surprise, AZ)
Golden State Athletic Conference
Otterbein (Westerville, OH)
Ohio Athletic Conference