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- Lynde Palmer (see Mary Louise Peebles)
- Christopher Paolini - Inheritance cycle
- Barbara Park - Skinnybones, Junie B. Jones series
- Peter Parnall - Winter Barn, Apple Tree, Woodpile
- Katherine Paterson - Bridge to Terabithia, Jacob Have I Loved
- James Patterson - The Maximum Ride series, The Dangerous Days of Daniel X
- Jill Paton Walsh - Gaffer Samson's Luck, The Emperor's Winding Sheet
- Gary Paulsen - Hatchet, The Time Hackers
- Michelle Paver - Chronicles of Ancient Darkness series
- Philippa Pearce (1920–2006) - Tom's Midnight Garden
- Ridley Pearson - Peter and the Starcatchers series, The Kingdom Keepers series
- Howard Pease (1894–1974) - Secret Cargo, Highroad to Adventure, Bound for Singapore
- Dale Peck - Drift House series
- Ethel Pedley (1859–1898) - Dot and the Kangaroo
- Mary Louise Peebles a.k.a. Lynde Palmer (1833–1915) - The Magnet Stories
- Bill Peet (1915–2002) - The Wump World, Hubert's Hair-Raising Adventure
- Daniel Pennac - Eye of the Wolf (L'Œil du loup)
- Lucy Fitch Perkins (1865–1937) - The Twins series
- Lynne Rae Perkins (born 1956) - Criss Cross, All Alone in the Universe
- Charles Perrault (1628–1703) - Tales of Mother Goose, Little Red Riding Hood
- Rodman Philbrick (born 1951) - Freak The Mighty, Max the Mighty, The Last Book in the Universe
- Joan Phipson (1912–2003) - The Boundary Riders, The Family Conspiracy, Polly's Tiger
- Tanwir Phool (born 1948) - Gulshan-e-Sukhan (Garden of Poetry) & Chiryaa, Titli, Phool
- Tamora Pierce (born 1954) - The Tortall series, Circle of Magic series
- Christopher Pike - The Spooksville series
- Dav Pilkey - The Captain Underpants series
- Daniel Pinkwater - The Big Orange Splot, The Hoboken Chicken Emergency
- Saviour Pirotta - The Orchard Book of First Greek Myths
- Annabel Pitcher - My Sister Lives on the Mantelpiece
- Kin Platt (1911–2003) - The Big Max series, The Blue Man
- Peter Pohl (born 1940) - Johnny, My Friend
- Jacques Poustis (born 1949) - Joyeux anniversaire! (Happy Birthday!)
- Eleanor H. Porter (1868–1920) - Pollyanna
- Tracey Porter - Billy Creekmore
- Beatrix Potter (1866–1943) - The Tale of Peter Rabbit, The Tailor of Gloucester
- Ellen Potter - The Olivia Kidney series
- Rhoda Power (1890–1957) - Redcap Runs Away
- Terry Pratchett - The Nome Trilogy, Johnny Maxwell series, The Amazing Maurice and his Educated Rodents, Tiffany Aching series
- Otfried Preussler (born 1923) - The Robber Hotzenplotz, The Curse of the Darkling Mill
- Guillaume Prevost - The Book of Time trilogy
- Willard Price (1887–1983) Amazon Adventure and others in the Adventure series
- Elise Primavera - The Secret Order of the Gumm Street Girls
- Alison Prince (born 1931) - My Royal Story
- Patricia Puddle - Star-Crossed Rascals, Velvet Ball and the Broken Fairy, Molly Gumnut Rescues a Bandicoot
- Josephine, Diana, and Christine Pullein-Thompson - Six Ponies, I Wanted a Pony, We Rode to the Sea & other pony books
- Philip Pullman (born 1946) - His Dark Materials trilogy, Clockwork, The Firework-Maker's Daughter
Read more about this topic: List Of Children's Literature Authors