List of organized baseball leagues

International competition

• Many international baseball events are coordinated by the baseball division of the World Baseball Softball Confederation, including the World Baseball Classic.

  Americas

• Latin American Series
• Caribbean Series

  United States

Youth Leagues & Major Organizations

• , youth and showcase baseball, headquartered in Greenville, South Carolina.
• American Amateur Youth Baseball Alliance, a youth program, headquartered in Saint Louis, Missouri
• American Legion Baseball, a youth program, headquartered in Indianapolis, Indiana.
• Babe Ruth League, a youth program, headquartered in Hamilton, New Jersey.
• CABA, a youth baseball tournament organizer in the USA.
• a Division of Babe Ruth League, Inc.
• , a youth program, headquartered in Marshall, Texas.
• Fellowship of Christian Athletes
• , a youth program 8U to 18U, headquartered in Westchester, NY
• , a youth program, headquartered in Sherwood, Oregon.
• Little League Baseball, a youth program, headquartered in Williamsport, Pennsylvania.
• Nations Baseball, a youth program in the USA.
• Perfect Game, a youth baseball tournament organizer in the USA.
• Pony Baseball, a youth program, headquartered in Washington, Pennsylvania.
• , a youth program in the USA.
• , provides competitive leagues and tournaments ages 7 to 18, in Utah, Idaho, and Nevada, headquartered in Logan, Utah.
• Roy Hobbs Baseball, an over 30 amateur, adult men's baseball organization, headquartered out of Ft. Myers, FL, with national and international Leagues and Teams
• Travelball Select, a youth baseball tournament organizer in the USA.
• Triple Crown Sports, a youth baseball tournament organizer in the USA.
• USABL, a youth program, headquartered in Point Pleasant, New Jersey .
• , a youth and adult program, headquartered in Kissimmee, Florida.

  High school

• In the US, the National Federation of State High School Associations and each state association governs the play of baseball at the high school level. The Federated Christian Athletic Association and state Christian associations oversee the play of baseball at the private Christian School level. Note, however, that a substantial number of Christian schools choose instead to join their state's general athletic association if the organization's rules allow it.

  Alternative baseball

• * , United States

  Amateur baseball

• , an over 30 amateur, adult men's baseball organization, headquartered out of Ft. Myers, FL, with national and international Leagues and Teams
• , United States
• , United States
• , United States
• , United States, Founded in 1988, it is the largest amateur baseball league in America. The league has 325 local affiliates, 3,200 teams and 45,000 members who play organized amateur baseball in local leagues, 30 regional tournaments and six national tournaments.
• , United States
• , United States
• , United States
• Ligue de Baseball Élite du Québec, Canada
• New Brunswick Senior Baseball League, Canada
• Nova Scotia Senior Baseball League, Canada
• National Adult Baseball Association, United States
• Cuban National Series
• Brazilian Baseball Championship
• , United States
• All-American Amateur Baseball Association, United States
• Federación Panameña de Beisbol, Panamá
• Minnesota Baseball Association, United States

[College baseball]

• NCAA conferences: :Category:NCAA Division I baseball by conference|Division I, :Category:NCAA Division II baseball by conference|Division II, :Category:NCAA Division III baseball by conference|Division III, and the College World Series
• NAIA conferences, including the NAIA Baseball World Series
• National Club Baseball Association conferences
• National Junior College Athletic Association conferences
• List of Collegiate Summer Baseball Leagues

  [Town Team Baseball]

• The Minnesota Baseball Association is the sanctioning body for amateur baseball leagues in Minnesota. A statewide list of leagues is available at the organization's website.

  Semi-professional baseball

• Perkiomen Valley Twilight League
• Intercounty Baseball League

• [Professional baseball]

• Major League Baseball in the United States and Canada, made up of two component leagues;
• *National League
• *American League
• Minor League Baseball in the United States and Canada, comprising several levels and multiple component leagues;
• *AAA-level
• **International League
• **Pacific Coast League
• *AA-level
• **Eastern League
• **Southern League
• **Texas League
• *A-level
• **High-A / A-advanced
• ***California League
• ***Carolina League
• ***Florida State League
• **A-level
• ***Midwest League
• ***South Atlantic League
• *Short-season A-level
• **New York – Penn League
• **Northwest League
• *Rookie-league
• **Rookie-advanced
• ***Appalachian League
• ***Pioneer Baseball League
• **Rookie-level
• ***Arizona League
• ***Gulf Coast League
• ***Dominican Summer League
• Independent League baseball in the United States and Canada
• *American Association of Independent Professional Baseball
• *Atlantic League of Professional Baseball
• *Empire Professional Baseball League
• *Frontier League
• *Pacific Association of Professional Baseball Clubs
• *Pecos League
• *United Shore Professional Baseball League

  Instructional Leagues

• California Winter League*

  Latin America

• Colombian Professional Baseball League*, Colombia
• Cuban National Series*, Cuba
• Dominican Professional Baseball League*, Dominican Republic
• Mexican Pacific League*, Mexico
• Liga Norte de México, Mexico
• Mexican League, Mexico
• Nicaraguan Professional Baseball League*, Nicaragua
• Panamanian Professional Baseball League*, Panama
• Liga de Béisbol Profesional Roberto Clemente*, Puerto Rico
• Venezuelan Professional Baseball League*, Venezuela

  Defunct Leagues

• Federal League defunct since 1915, in the United States
• Union Association
• Negro League baseball, defunct since 1958, in the United States
• All-American Girls Professional Baseball League, defunct since 1954, in the United States
• Canadian Baseball League
• Cuban League*
• Venezuelan Summer League
• North Country Baseball League

  Asia

• Asia Series
• Asia Winter Baseball League

  Japan

• Nippon Professional Baseball
• * Central League
• * Pacific League
• ** Eastern League
• ** Western League
• * Japanese Baseball League
• Shikoku Island League Plus
• Baseball Challenge League
• Kansai Independent Baseball League
• National Baseball League
• Japan Women's Baseball League

  South Korea

• KBO League
• * KBO Futures League
• KIBA Dream League
• Gyeonggi Challenge Baseball League
• Korea Women's Baseball League

  Taiwan

• Chinese Professional Baseball League
• * Chinese Professional Baseball Minor League
• Taiwan Major League
• National Adult Class A Spring League

  China

• China National Baseball League
• China Baseball League, China

  Lao PDR

• KOICA Cup Lao Baseball League, Lao PDR

  Philippines

• Baseball Philippines
• Philippine Baseball League
• UAAP Baseball Championship

  Defunct Leagues

• Israel Baseball League
• Thailand Baseball League

  Europe

• , Austria
• Division Élite, France
• Bundesliga, Germany
• Irish Baseball League
• Italian Baseball League, Italy
• Honkbal Hoofdklasse, Netherlands
• :hu:Baseball#A baseball Magyarorsz.C3.A1gon|Hungarian National Baseball League, Hungary
• Liga Atlântica de Basebol, Portugal
• División de Honor de Béisbol, Spain
• Elitserien, Sweden
• National League, United Kingdom
• Baseballin SM-sarja, Finland
• Latvian Baseball Federation, Latvia
• Interlyga, Finland, Estonia, Latvia, Lithuania, Belarus
• , Switzerland ~ Translated - Major League Sticky Ball Ball
• , Kyiv, Ukraine
• , Poland

  Oceania

• Australian Baseball League
• Greater Brisbane League, Australia
• New South Wales Major League, Australia
• Palau Major League
• Budweiser Baseball League, Guam