Series beginning with J
- Jack and the Geniuses
- Jack Beechwhistle
- Jack Blank Adventures
- Jack Christie Adventures
- Jack Courtney Adventure
- Jack Slater
- Jack Stalwart
- Jack Staples
- Jack's Secret Summer
- Jacky Daydream
- Jake Atlas
- Jake the Fake
- Jamie Johnson
- Jamie McFlair
- Jane Austen Investigates
- Jane Blonde
- Janitors
- Jasmine Green Series
- Jasper
- Jasper and Scruff
- Jennifer Jones
- Jennings
- Jess Jordan
- Jess Tennant
- Jessica Cole: Model Spy
- Jessica Darling's It List
- Jewel Princesses
- Jewel Thieves
- Jiggy McCue
- Jiggy's Genes
- Jill
- Jim Reaper
- Jimmy Coates
- Jimmy Fincher Saga
- Jinny at Finmory
- Jinx
- Jinxed
- Joe All Alone
- Joe Rat
- Joe, A Boy and His Horses
- Joey Pigza
- Johnny Ball
- Johnny Catbiscuit
- Johnny Coffin
- Johnny Mackintosh
- Johnny Maxwell
- Jolley-Rogers
- Jordan Stryker
- Joshua Files
- Journey Trilogy
- Joy
- Judy Moody
- Judy Moody and Friends
- Julius Zebra
- Junior Monster Scouts
- Jupiter
- Just