| Pallacanestro Trieste | Lega Basket Serie A | Trieste | 1975 | Palatrieste |
| Pallacanestro Varese | Lega Basket Serie A | Varese | 1945 | PalaWhirlpool |
| Pallacanestro Virtus Cassino | — | Frosinone | 2011 | — |
| Pallalcesto Amatori Udine | inactivo | Údine | 1944 | Palasport Primo Carnera |
| Pantere Basket Femminile | — | — | — | — |
| Partenio Avellino | — | — | — | — |
| Partenope Napoli Basket | — | Sant'Antimo | 1957 | — |
| PB63 Lady | — | — | 1963 | — |
| PCR Messina | — | Mesina | — | — |
| Perugia Basket | — | — | — | — |
| Pescara Basket | Serie C (Italian men's basketball league) | Pescara | — | PalaElettra |
| PF Schio | — | Schio | 1973 | — |
| Philadelphia 76ers | National Basketball Association | Filadelfia | 1946 | Xfinity Mobile Arena, Toyota Coliseum, Philadelphia Arena, The Spectrum, Philadelphia Convention Hall and Civic Center, Oncenter War Memorial Arena |
| Philadelphia Athletics | — | — | 1901 | — |
| Philadelphia Eagles | National Football League | Filadelfia | 1933 | Lincoln Financial Field |
| Philadelphia Flyers | — | — | 1967 | The Spectrum, Xfinity Mobile Arena |
| Philadelphia Phillies | Grandes Ligas de Béisbol | Filadelfia | 1883 | Citizens Bank Park |
| Philadelphia Union | Major League Soccer | Chester | 2008 | Subaru Park |
| Phoenix Suns | National Basketball Association | Phoenix | 1968 | Arizona Veterans Memorial Coliseum, Footprint Center |
| Pirata Fútbol Club | Primera División del Perú | — | 15 de noviembre de 2015 | Estadio Francisco Mendoza Pizarro |
| Pistoia Basket 2000 | Lega Basket Serie A | Pistoya | 2000 | PalaFermi |
| Pittsburgh Penguins | — | — | 1967 | Pittsburgh Civic Arena, PPG Paints Arena |
| Pittsburgh Pirates | Grandes Ligas de Béisbol | Pittsburgh | 1887 | Recreation Park, Exposition Park, Three Rivers Stadium, Forbes Field, PNC Park |
| Pittsburgh Pirates | — | — | 1925 | Duquesne Garden |
| Pittsburgh Steelers | National Football League | Pittsburgh | 1933 | Acrisure Stadium, Three Rivers Stadium |
| PMS Basketball | — | Moncalieri | — | — |
| Poderosa Basket Montegranaro | — | Montegranaro | 1993 | — |
| Polisportiva Cervia Milano Marittima | — | — | — | — |
| Polisportiva Dinamo | — | — | — | — |
| Polisportiva Dinamo Lab | — | — | — | — |
| Polisportiva Folgore Nocera | — | — | — | — |
| Portland Timbers | Major League Soccer | Portland | 2009 | Providence Park |
| Portland Trail Blazers | National Basketball Association | Portland | 1970 | Veterans Memorial Coliseum, Moda Center |
| Porvenir Miraflores | Copa Perú | — | 29 de mayo de 1922 | Estadio Nacional del Perú |
| Potenza 84 | — | Potenza | — | — |
| Progresso Castel Maggiore | — | Castel Maggiore | — | — |
| Quebec Bulldogs | — | — | 1888 | Quebec Skating Rink |
| Raggisolaris Faenza | — | Faenza | — | — |
| Real Salt Lake | Major League Soccer | Salt Lake City | 2005 | America First Field |
| Real Sebastiani Rieti | Serie A2 | Rieti | 2020 | — |
| Reales de Kansas City | Grandes Ligas de Béisbol | — | 1969 | Kauffman Stadium |
| Red Bull New York | Major League Soccer | Harrison | 1995 | Giants Stadium, Sports Illustrated Stadium |
| Reyer Venezia Mestre Femminile | — | Venecia | 1925 | — |
| Riva del Garda Basket | — | Riva del Garda | — | — |
| Robur Basket Osimo | — | Osimo | — | — |
| Roseto Sharks | — | Roseto degli Abruzzi | 1946 | — |
| Rovereto Basket | — | Rovereto | — | — |
| Ruvo di Puglia Basket | — | — | — | — |