P
- Paatos
- Pain of Salvation
- Pan Out Now
- Pangaea
- Panzerpappa
- Paradox One
- Paragon
- Parallel or 90 degrees
- Paranoise
- Parva Chama (Hot Fur)
- Part Time Project (PTP)
- Pat Metheny Group
- PBII
- De officiële site van de Nederlandse Prog-Rock band PBII, voorheen Plackband. The official site of the Dutch prog rock band PBII, formerly known as Plackband. Harry den Hartog, Ronald Brautigam, Michel van Wassem, Tom van der Meulen.
- Peanuts (currently Day Six)
- Pendragon
- Anthony Phillips
- Phish
- Phreeworld
- Pickle Petrovich
- Picture of the Moon
- Pilgrym
- The Pineapple Thief
- Richard Pinhas
- Pink Floyd (Brain Damage)
- Pink Floyd (The Wall Of Links)
- Pink Floyd (Pink Floyd Fan Network)
- Plackband
- Platos HalO (mp3.com)
- Pooh
- Poor Genetic Material
- Poisoned Electrick Head
- Porcupine Tree
- Porcupine Tree (at Delirium)
- Proloud
- PropheXy
- PropheXy Home Page
- Psicodreamics
- Puppetshow
- Project E