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- Pacifica Quartet
- Paganini Quartet
- Panocha Quartet
- Párkányi Quartet
- Parker String Quartet
- Parisii String Quartet
- Pascal Quartet
- Pavao Quartet
- Pavel Haas Quartet
- Parrenin Quartet
- Petersen Quartet
- Philharmonia Quartet
- Philharmonic Quartet
- Poltronieri Quartet
- Portland String Quartet
- Post Quartet
- Prague Quartet
- Prague String Quartet (Kvarteto města Prahy)
- Premiere String Quartet
- Primrose Quartet
- Prisca Quartet
- Pro Arte Quartet
- Puddles Quartet
Read more about this topic: List Of String Quartet Ensembles