Athletic conference
collection of sports teams, playing competitively against each other, sometimes subdivided into divisions
MAC Freedom Conference
Macomb Area Conference
Maryland Interscholastic Athletic Association
Metro Catholic Conference
Metro Conference
Metro Suburban Conference
Metropolitan Interscholastic Conference
Metropolitan New York Conference
Michigan Collegiate Conference
Michigan Intercollegiate Athletic Association
Mid-America Intercollegiate Athletics Association
Mid-Atlantic Athletic Conference
Mid-Hudson Athletic League
Mid-South Conference
Middle Atlantic Conferences
Midlands Collegiate Athletic Conference
Midwest Collegiate Conference
Midwest Conference
Midwest Intercollegiate Football Conference
Midwestern Intercollegiate Volleyball Association
Milwaukee City Conference
Minnesota College Athletic Conference
Mission Valley Athletic League
Mississippi 8 Conference
Mississippi Valley Conference
Mississippi Valley Conference
Missouri River Conference
Mountain East Conference
Mountain Valley Conference
National Collegiate Hockey Conference
Commonwealth Coast Football
New England Preparatory School Athletic Council
New England Women's and Men's Athletic Conference
New Jersey Interscholastic Athletic Association
New Orleans Catholic League
North Atlantic Conference
North Central Conference
North Central Conference
North Central Conference
North Coast Athletic Conference
North Egypt Conference
North Shore Conference
North Star Conference
Northeast Hoosier Conference
Northeast Ohio Conference
Northern 10 Athletic Conference
Northern California Athletic Conference
Northern Illinois Big 12 Conference
Northern Indiana Athletic Conference
Northern Nevada 4A Region