List of developmental and minor sports leagues

This is a list of developmental and minor sports leagues, two concepts which are largely restricted to North American sports. Note that this does not include teams in leagues that include promotion and relegation.

Baseball

Minor League Baseball
- International League (Class AAA)
- Pacific Coast League (Class AAA)
- Eastern League (Class AA)
- Southern League (Class AA)
- Texas League (Class AA)
- Midwest League (Class A+)
- Northwest League (Class A+)
- South Atlantic League (Class A+)
- California League (Class A)
- Carolina League (Class A)
- Florida State League (Class A)
- Arizona Complex League (rookie)
- Florida Complex League (rookie)
- Dominican Summer League (rookie)
Off-season leagues
- Arizona Fall League (off-season)
- Colombian Professional Baseball League (off-season)
- Dominican Winter Baseball League (off-season)
- Mexican Pacific League (off-season)
- Puerto Rico Baseball League (off-season)
- Venezuelan Professional Baseball League (off-season)
Independent baseball leagues
- American Association †
- Atlantic League †
- Empire League
- Frontier League †
- Mexican League
- Pecos League
- Pioneer League †
- United Shore League

† MLB Partner Leagues

Basketball

Affiliated:

Independent:

Pro

National Basketball League of Canada (NBL Canada)
The Basketball League (TBL)
The Basketball Tournament (TBT)
Big3
Overtime Elite (OTE)

Semi-Pro

American Basketball Association (ABA)
Canadian Elite Basketball League (CEBL)
Central Basketball Association (CBA)
East Coast Basketball League (ECBL)
Florida Basketball Association (FBA)
Maximum Basketball League (MBL)
National Basketball League of Canada (NBL Canada)
North American Basketball League (NABL)
Premier Basketball League (PBL)

United Basketball League (UBL)
Universal Basketball Association (UBA)

American football

Outdoor:

High-level

United Football League

Low-level

Indoor:

High-level

Mid-level

American Indoor Football

Low-level

Ice hockey

Professional:

American Hockey League (high-level)
ECHL (formerly East Coast Hockey League) (mid-level)
Federal Prospects Hockey League (low-level)
Ligue Nord-Américaine de Hockey (low-level)
SPHL (formerly Southern Professional Hockey League) (low-level)

Juniors:

Canadian Hockey League (CHL; an umbrella organization)
- Ontario Hockey League (Major junior)
- Quebec Major Junior Hockey League (Major junior)
- Western Hockey League (Major junior)
United States Hockey League (Tier I)

Association football (soccer)

United Soccer League
- USL Championship (men's Division II)
- USL Super League (women's Division II, planned to start in 2023)
- USL League One (men's Division III)
MLS Next Pro (Division III)
National Independent Soccer Association (Division III)
United Women's Soccer (women's Division II)
Women's Premier Soccer League (women's Division II)

Indoor soccer

Major Arena Soccer League 2 (M2)

Auto racing

Cricket

Minor League Cricket

Rugby union

Vodacom Cup (South Africa; now defunct. During the competition's existence, teams from Argentina and Namibia were occasionally included.)
Rugby Challenge (South Africa; successor to the Vodacom Cup. Includes the same Namibian team that occasionally featured in the Vodacom Cup.)