| 15 de Septiembre de Trujillo | Copa Peru | — | — | Estádio Mansiche |
| A.S.S.I. Basket 99 Cremona | — | — | — | — |
| Academia Deportiva Cantolao | Copa Peru | — | 2012 | Estádio Miguel Grau (Callao) |
| AD Comerciantes FC | Segunda División (Campeonato Peruano de Futebol) | — | — | — |
| Alcides Vigo | Copa Peru | — | 1950 | — |
| Alfonso Ugarte de Chiclon | Copa Peru | — | 1917 | Estádio Mansiche |
| Alfonso Ugarte de Puno | Copa Peru | — | 1928 | Estadio E. Torres Belón |
| Alianza Cristiana | Segunda División (Campeonato Peruano de Futebol) | — | 14 de abril de 2008 | Estadio Max Augustín |
| Alianza Frigorífico Nacional | — | — | — | Estadio Nacional del Perú (1897) |
| Alianza Unicachi | Copa Peru | — | 2010 | Estadio E. Torres Belón |
| Alipio Ponce de Mazamari | Copa Peru | — | 21 de junho de 1979 | — |
| Alpo Basket '99 | — | Alpo | — | — |
| Ambrosiana Milano | — | Milão | — | — |
| AMG Sebastiani Basket Rieti | — | Rieti | 1946 | — |
| Anaheim Ducks | — | — | 1993 | Honda Center |
| Ancona Basket | — | Ancona | — | — |
| Angels Santarcangelo | — | — | — | — |
| Aquila Basket Trento | Liga Italiana de Basquetebol | Trento | 1995 | BTS Arena |
| Aresium Milano | — | Milão | — | — |
| Aretusa Sports Centre | — | — | — | — |
| Arizona Cardinals | National Football League | — | 1920 | Comiskey Park, Wrigley Field, Busch Memorial Stadium, Soldier Field, State Farm Stadium, Sun Devil Stadium, Metropolitan Stadium, Sportsman's Park |
| Arizona Coyotes | — | Tempe, Glendale, Phoenix | 1972 | Desert Diamond Arena, Footprint Center, Mullett Arena |
| Arizona Diamondbacks | Major League Baseball | Phoenix | 1998 | Chase Field |
| AS Vicenza | Serie A1 | Vicenza | 1958 | — |
| ASD Basket DLF La Spezia Claudio Papini | — | La Spezia | 1936 | — |
| ASD Briantea84 | — | Cantù | 1984 | — |
| ASD Polisportiva Amicacci | — | — | 1984 | — |
| ASD S.Stefano Sport | — | Porto Potenza Picena | 1977 | — |
| ASDG Comense 1872 | — | Como | 1872 | — |
| Asociación Civil Real Atlético Garcilaso | Campeonato Peruano de Futebol | — | 2009 | Estádio Inca Garcilaso de la Vega |
| Asociación Deportiva Hospital | Copa Peru | — | 25 de fevereiro de 1971 | Estadio Aliardo Soria Pérez |
| Asociación Deportiva San Agustín | Copa Peru | — | 9 de agosto de 1970 | Estádio Nacional do Peru |
| Asociación Deportiva Somos Aduanas | Copa Peru | — | 1995 | Estádio Miguel Grau (Callao) |
| Assi Basket Ostuni | — | Ostuni | — | — |
| Association Chorrillos | Copa Peru | — | — | Estadio Municipal de Chorrillos |
| Association Football Club | — | — | 20 de maio de 1897 | Estadio Nacional del Perú (1897) |
| Associazione Basket Latina | — | Latina | — | — |
| Associazione Pallacanestro Udinese | — | Udine | 1944 | — |
| Associazione Sportiva Luiss | — | — | — | — |
| Athletic Club José Pardo | Copa Peru | — | — | Estadio Max Augustín |
| Athletic Genova | — | Gênova | 1968 | — |
| Athletics | Major League Baseball | — | 1968 | Sutter Health Park |
| Atlanta Braves | Major League Baseball | — | 1871 | Truist Park, Milwaukee County Stadium, Fenway Park, Congress Street Grounds, Braves Field, Turner Field, Atlanta-Fulton County Stadium, South End Grounds I |
| Atlanta Falcons | National Football League | Flowery Branch, Atlanta | 1966 | Georgia Dome, Mercedes-Benz Stadium |
| Atlanta Hawks | National Basketball Association | Atlanta | 1946 | Georgia Dome, State Farm Arena, UW–Milwaukee Panther Arena, St. Louis Arena, Wharton Field House, Kiel Auditorium, Alexander Memorial Coliseum, Omni Coliseum |
| Atlanta United FC | Major League Soccer | Atlanta | 2014 | Mercedes-Benz Stadium, Bobby Dodd Stadium |
| Atlético Barrio Frigorífico | Copa Peru | — | — | — |
| Atlético Belén de Moyobamba | Copa Peru | — | 20 de abril de 1960 | Estadio IPD de Moyobamba |