| Painted Bird Theatre | Painted Bird Theatre | 2010 | 8 | |
| Pan Asian Repertory Theatre | Pan Asian Repertory Theatre | 1993 – 2021 | 2 | |
| Panellinios Dramatikos Thiasos | Panellinios Dramatikos Thiasos | 1899 – 1900 | 3 | |
| Pangdemonium | Pangdemonium | 2025 | 1 | |
| Partido da Causa Operária | Partido da Causa Operária (Workers' Cause Party) | 2024 | 1 | |
| Pasadena Community Players | Pasadena Community Players | 1921 – 1934 | 6 | |
| Pasadena Playhouse | Pasadena Playhouse | 1927 – 2025 | 16 | |
| Pasadena Playhouse College of Theatre Arts | Pasadena Playhouse College of Theatre Arts | 1943 – 1966 | 28 | |
| Pasadena Playhouse Senior Players | Pasadena Playhouse Senior Players | 1936 – 1946 | 9 | |
| Passage Theatre, The | The Passage Theatre | 1984 | 1 | |
| Paul Linsemanns Schauspiel-Gesellschaft | Paul Linsemanns Schauspiel-Gesellschaft | 1905 – 1910 | 11 | |
| PBS | PBS | 1992 | 4 | 2 |
| PE – Teatro Piemonte Europa | PE – Teatro Piemonte Europa | 2025 | 2 | |
| Peer Gynt as | Peer Gynt as | 2006 – 2022 | 110 | 2 |
| Peer Gynt Festival | Peer Gynt Festival | 1928 – 2016 | 30 | |
| Peer Gynt Sommermøte 2009 | Peer Gynt Sommermøte 2009 | 2009 | 1 | |
| Peerinor Produksjoner | Peerinor Produksjoner | 2001 – 2003 | 3 | |
| Peking Normal College for Women | Peking Normal College for Women | 1923 | 1 | |
| Peking People's Art Drama College | Peking People's Art Drama College | 1925 | 1 | |
| Pelican ProductionsPelican Productions | Pelican Productions | 2023 | 1 | |
| Pen, Paint, and Pretzels | Pen, Paint, and Pretzels | 1957 | 1 | |
| People's Theatre | People's Theatre | 1922 – 1967 | 4 | |
| Performing Arts of Chinese Americans in Greater Chicago | Performing Arts of Chinese Americans in Greater Chicago | 2006 | 2 | |
| Performing Arts of Woodstock | Performing Arts of Woodstock | 2025 | 1 | |
| Periferifestivalen | Periferifestivalen | 2007 | 2 | |
| Pervyj Sovetskij teatr im. Lenina | Pervyj Sovetskij teatr im. Lenina (The First Lenin Soviet Theatre) | 1920 | 1 | |
| Petofi Színház | Petofi Színház | 2005 | 1 | |
| Petras International Festival | Petras International Festival | 2006 | 1 | |
| Pfalztheater Kaiserslautern | Pfalztheater Kaiserslautern | 1972 – 2001 | 5 | |
| Phoenix Players, The | The Phoenix Players | 1966 – 2006 | 3 | |
| Piccola compagnia impertinente | Piccola compagnia impertinente | 2022 – 2023 | 1 | 1 |
| Piccolo Teatro di Milano | Piccolo Teatro di Milano - Teatro d'Europa | 2022 | 2 | 1 |
| Pilgrims, The | The Pilgrims | 1925 | 1 | |
| Pima Community College | Pima Community College | 2025 | 1 | |
| Pit Company, The | The Pit Company | 1904 | 1 | |
| Pittsburgh Public Theater | Pittsburgh Public Theater | 1984 | 1 | |
| Plan B Entertainment | Plan B Entertainment | 2025 | 1 | |
| Play Actors, The | The Play Actors | 1912 | 1 | |
| Playhouse Theatre | Playhouse Theatre | | | |
| PlayMakers Repertory Company | PlayMakers Repertory Company | 2015 | 1 | |
| Plexus Polaire | Plexus Polaire | 2023 – 2025 | 38 | 1 |
| Pocketteatret | Pocketteatret | 2001 – 2002 | 6 | |
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