Joseph "Jeph" Loeb III is an American film and television writer, producer and award-winning comic book writer. Loeb was a producer/writer on the TV series Smallville and Lost, writer for the films Commando and Teen Wolf, and a writer and co-executive producer on the NBC TV show Heroes from its premiere in 2006 to November 2008. In 2010, Loeb became Executive Vice President of Marvel Television.

A four-time Eisner Award winner and five-time Wizard Fan Awards winner, Loeb's comic book work, which has appeared on the New York Times Best Seller list, includes work on many major characters, including Spider-Man, Batman, Superman, Hulk, Captain America, Cable, Iron Man, Daredevil, Supergirl, the Avengers, and Buffy the Vampire Slayer, much of which he has produced in collaboration with artist Tim Sale.