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- Palgrave Macmillan
- Pan Books - now Pan Macmillan
- Pantheon Books at Random House
- Parachute Publishing
- Parragon
- Pathfinder Press
- Paulist Press
- Pavilion Books - UK publisher of illustrated books
- Peace Hill Press
- Pecan Grove Press
- Pen and Sword Books
- Penguin Books UK
- Penguin Putnam Inc. (USA)
- Penn State University Press
- Persephone Books
- Perseus Books Group - American publishing company
- Peter Lang
- Peter Owen Publishers
- Phaidon Press
- Philosophy Documentation Center
- Philtrum Press
- Picador UK
- Pimlico Books at Random House
- Pluto Press
- Point Blank - an imprint of Wildside Press
- Poisoned Pen Press
- The Policy Press
- Polity
- Practical Action
- Prentice Hall
- Prime Books
- Princeton University Press
- Progress Publishers
- Prometheus Books
- Profile Books
- Puffin Books - an imprint of Penguin Books
- G. P. Putnam's Sons
Read more about this topic: List Of English-language Book Publishing Companies