- Pavilion Books Group Ltd.
- Pearson Education
- Pen Press Publishing
- Penguin Books
- Perseus Distribution
- Perseus-Running Press
- Peter Owen Publishers
- Poisoned Pen Press
- Polirom
- Polygon Books
- Poolbeg
- Prestel Publishing
- Princeton University Press
- Prometheus Books
- Promopress
- PublicAffairs
- Publisher Details Unknown
- Quadrille Publishing
- Quartet Books
- Quarto Publishing
- Quercus Books
- Quintessence
- Quintessenz Verlags
- RANDOM HOUSE ESPANOL
- RAO
- ROCKPORT PUBL
- RP&S and Cico Books
- Random House
- Ravensburger Buchverlag
- Ravensburger Spieleverlag
- Rebellion Publishing
- Red Fox
- Revell Publishing
- Rizzoli
- Roads Publishing
- Robert Hale Ltd.
- Routledge
- Royal Collection Trust
- SAGE Publications
- SOUTHWATER
- Saraband
- Schilt Publishing
- Scholastic
- Scholastic UK Ltd.
- Scribner
- Search Press
- Seren Books
- Serpent's Tail
- Severn House Publishers
- Signet Classics