NCAA Division I

Division I is the highest level of college sports in the National Collegiate Athletic Association (NCAA) in the United States. Its schools generally have the biggest budgets, the best facilities, and offer more their students more athletic scholarships than Divisions II and III.
Below is a list of sports conferences belonging to Division I:
Football Bowl Subdivision
American Athletic Conference
Atlantic Coast Conference
Big Ten Conference
Big 12 Conference
Conference USA
Mid-American Conference
Mountain West Conference
Pacific-12 Conference
Southeastern Conference
Sun Belt Conference
Football Championship Subdivision
Big Sky Conference
Big South Conference - As of the 2023 football season, the Big South and Ohio Valley Conferences are partners in a football-only alliance that has a single automatic berth in the FCS playoffs.
Ivy League
Mid-Eastern Athletic Conference
Northeast Conference
Ohio Valley Conference - Partner with the Big South Conference in football.
Patriot League
Southern Conference
Southland Conference
Southwestern Athletic Conference
These conferences only play football:
CAA Football - Although run by the all-sports Coastal Athletic Association, it is legally separate.
Missouri Valley Football Conference
Pioneer Football League
United Athletic Conference - A football-only partnership between the ASUN Conference and Western Athletic Conference.
Other conferences
These conferences do not play football, but do play basketball:
America East Conference
ASUN Conference - Partner in the United Athletic Conference.
Atlantic 10 Conference
Big East Conference
Big West Conference
Coastal Athletic Association - As noted above, the CAA football conference is separate from the all-sports conference.
Horizon League
Metro Atlantic Athletic Conference
Missouri Valley Conference
The Summit League
West Coast Conference
Western Athletic Conference - Partner in the United Athletic Conference.
These conferences play more than one sport, but do not play either football or basketball:
Coastal Collegiate Sports Association (men's and women's swimming and diving, plus women's beach volleyball)
Mountain Pacific Sports Federation
These conferences only play ice hockey:
Atlantic Hockey (men only) - Will merge with College Hockey America in 2024. The name of the merged conference has yet to be announced.
Central Collegiate Hockey Association (men only)
College Hockey America (women only) - Will merge with Atlantic Hockey in 2024.
ECAC Hockey
Hockey East
National Collegiate Hockey Conference (men only)
New England Women's Hockey Alliance
Western Collegiate Hockey Association (women only)
The only Division I all-sports conference that plays either men's or women's ice hockey is the Big Ten. It started a men's hockey league in 2013-14.
The Ivy League technically sponsors ice hockey for both men and women, but does not hold a championship tournament. All Ivy League schools that play ice hockey play in Hockey East. The Ivy League determines its champion from results of ECAC Hockey games that involve two Ivy members.
These conferences only play water polo. Two run men's and women's leagues, and the other runs only a women's league.
Collegiate Water Polo Association
Golden Coast Conference (women only)
Western Water Polo Association
One conference competes only in wrestling:
Eastern Intercollegiate Wrestling Association
These conferences play only one sport:
Eastern Association of Rowing Colleges
Pacific Coast Swim Conference
In some sports, the NCAA does not split schools into divisions because only a small number of schools play a given sport. Technically, conferences in these sports are not Division I. However, most of the schools in these conferences are in Division I in other sports.
These conferences only play men's volleyball (note that women's volleyball is split into divisions):
Eastern Intercollegiate Volleyball Association
Midwestern Intercollegiate Volleyball Association
These conferences only compete in skiing:
Eastern Intercollegiate Ski Association
Rocky Mountain Intercollegiate Ski Association
These conferences only compete in gymnastics:
Eastern Intercollegiate Gymnastics League (men only)
Midwest Independent Conference (women only)
Mountain Rim Gymnastics Conference (women only)
These conferences only compete in rifle shooting:
Great America Rifle Conference
Mid-Atlantic Rifle Conference
Patriot Rifle Conference
This conference only does fencing:
Midwest Fencing Conference