 | J. Thaddeus Toad | The Wind in the Willows | 2 |
 | Jack | Pitch Black | 1 |
| Jackie | Walk On The Wild Side | 1 |
| Jail | Chameleon Jail | 1 |
| James | Pokémon | 1 |
| James Potter | Harry Potter | 1 |
| James Tiberius Kirk | Star Trek: The Original Series | 1 |
| Jane Granger | Harry Potter | 1 |
| Janet Lester | Star Trek: The Original Series | 1 |
| Jason Grey | The Wotch | 1 |
| Jason Lombardi | The Darkstarr Chronicles | 1 |
| Jennifer Eccles | Lily The Pink | 1 |
| Jessica of Capella | Thousandstar | 1 |
| Jessica Spencer | The Hot Chick | 1 |
| Ji | Couch Trips | 1 |
| Jill McTeague | Cycler | 1 |
| Jim | DNA | 1 |
| Jinguji Shinobu | Steel Angel Kurumi | 1 |
| Joe Bates | The Joe Bates Saga | 1 |
| Johann Sebastian Bach Smith | I Will Fear No Evil | 1 |
| John Constantine | Hellblazer | 1 |
| John Crichton | Farscape | 1 |
| John Sheppard | Stargate: Atlantis | 1 |
| Jonathan "Johnny" Test | Johnny Test | 1 |
| Jordan the Barbarian | Crewel Lye | 1 |
| Jorj X. McKie | The Dosadi Experiment | 1 |
| Josephine Monaghan | The Ballad of Little Jo | 1 |
 | Josie and the Pussycats | Archie | 1 |
| Jughead Jones | Archie | 1 |
| Julie | DNA | 1 |
| Jung-Woo Im | Kill Me, Kiss Me (Korean) | 1 |
| Justin Tolkiberry | El Goonish Shive | 1 |
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