| 15 de Septiembre de Trujillo | Copa Perú | — | — | Estadio Mansiche |
| A.S. Junior Pallacanestro Casale | — | Casale Monferrato | 1956 | — |
| Academia Deportiva Cantolao | Copa Perú | — | 2012 | Estadio Miguel Grau |
| AD Comerciantes FC | Peruvian Segunda División | — | — | — |
| Alcides Vigo | Copa Perú | — | 1950 | — |
| Alfonso Ugarte de Chiclon | Copa Perú | — | 1917 | Estadio Mansiche |
| Alfonso Ugarte de Puno | Copa Perú | — | 1928 | Estadio E. Torres Belón |
| Alfonso Ugarte de Tacna | Copa Perú | — | — | Estadio Jorge Basadre |
| Alianza Cristiana | Peruvian Segunda División | — | 14 April 2008 | Estadio Max Augustín |
| Alianza Frigorífico Nacional | — | — | — | Estadio Nacional del Perú (1897) |
| Alianza Huánuco | Peruvian Segunda División | — | 1939 | Estadio Heraclio Tapia |
| Alianza Lima | Peruvian Primera División | — | 15 Februari 1921 | Alejandro Villanueva Stadium |
| Alianza Unicachi | Copa Perú | — | 2010 | Estadio E. Torres Belón |
| Alipio Ponce de Mazamari | Copa Perú | — | 21 Juni 1979 | — |
| Alpo Basket '99 | — | Alpo | — | — |
| AMG Sebastiani Basket Rieti | — | Rieti | 1946 | — |
| Anaheim Ducks | — | — | 1993 | Honda Center |
| Anderson Packers | National Basketball Association | Anderson | 1945 | Anderson High School Wigwam |
| Andrea Costa Imola | Lega Basket Serie A | Imola | 4 Oktober 1967 | — |
| Aresium Milano | — | Milan | — | — |
| Arizona Cardinals | Liga Nasional Sepak bola Amerika | — | 1920 | Comiskey Park, Wrigley Field, Busch Memorial Stadium, Soldier Field, Stadion State Farm, Mountain America Stadium, Metropolitan Stadium, Sportsman's Park |
| Arizona Coyotes | — | Tempe, Glendale, Arizona, Phoenix | 1972 | Desert Diamond Arena, Footprint Center, Mullett Arena |
| Arizona Diamondbacks | Major League Baseball | Phoenix | 1998 | Chase Field |
| AS Vicenza | Lega Basket Femminile | 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 Deportiva Hospital | Copa Perú | — | 25 Februari 1971 | Estadio Aliardo Soria Pérez |
| Asociación Deportiva San Agustín | Copa Perú | — | 9 Agustus 1970 | Stadion Nasional Peru |
| Asociación Deportiva Somos Aduanas | Copa Perú | — | 1995 | Estadio Miguel Grau |
| Asociación Deportiva Tarma | Copa Perú | — | 18 Juni 1929 | Union Tarma Stadium |
| Association Chorrillos | Copa Perú | — | — | Estadio Municipal de Chorrillos |
| Association Football Club | — | — | 20 Mei 1897 | Estadio Nacional del Perú (1897) |
| Associazione Basket Latina | — | Latina | — | — |
| Associazione Dilettantistica Pallacanestro Recanati | — | Recanati | — | — |
| Associazione Pallacanestro Udinese | — | Udine | 1944 | — |
| Associazione Sportiva Luiss | — | — | — | — |
| Athletic Club José Pardo | Copa Perú | — | — | Estadio Max Augustín |
| Athletic Genova | — | Genova | 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, Stadion Atlanta–Fulton County, South End Grounds I |
| Atlanta Falcons | Liga Nasional Sepak bola Amerika | Flowery Branch, Atlanta | 1966 | Georgia Dome, Stadion Mercedes-Benz |
| Atlanta Hawks | National Basketball Association | Atlanta | 1946 | Georgia Dome, State Farm Arena, UW–Milwaukee Panther Arena, Arena St. Louis, Wharton Field House, Kiel Auditorium, Paviliun McCamish, Coliseum Omni |
| Atlanta United FC | Liga Utama Sepak Bola Amerika Serikat | Atlanta | 2014 | Stadion Mercedes-Benz, Bobby Dodd Stadium |
| Atlético Barrio Frigorífico | Copa Perú | — | — | — |
| Atlético Belén de Moyobamba | Copa Perú | — | 20 April 1960 | Estadio IPD de Moyobamba |