A. J. Henderson is a Canadian voice actor and voice director known for his prolific work in anime, animated series, and video games from the 1980s onward. Born in North Vancouver, British Columbia, he built a career characterized by a wide range of vocal performances, often portraying gruff or older male characters. His body of work includes significant contributions to English-language dubs of numerous international productions.

Henderson's voice acting career encompasses a vast array of roles in anime dubbed into English. One of his notable parts from this era is voicing Baloo in the series Jungle Book: Shōnen Mowgli. He also provided the voice for Captain Gaspard in The Mysterious Cities of Gold, Flip the grasshopper in the Saban dub of Maya the Bee, Tik-Tok in The Wonderful Wizard of Oz, and Big Al Dente in Samurai Pizza Cats. Other anime roles include Walter Kangaroo in Adventures of the Little Koala and various characters in Astro Boy.

Beyond anime, Henderson became a familiar voice in many Western animated series. He is perhaps best recognized for his long-running roles on the children's series Arthur, where he voiced both Grandpa Dave Read and Ed Crosswire. His other extensive animation credits include Sharky in Sharky & George, Sammie in The Little Flying Bears, Professor Leonard in Tommy & Oscar, Cy in Ovide Video, and Sgt. Folenfant in Night Hood. He also voiced Sandy in Journey to the West – Legends of the Monkey King and appeared in shows like Madeline and The Little Lulu Show.

His work also extended into video games, with voice roles in titles such as Jagged Alliance 2, Prince of Persia: Warrior Within, Tom Clancy's Splinter Cell: Chaos Theory, and Still Life. In addition to acting, Henderson worked as a voice director on projects like the animated series Jim Button and Wunschpunsch.

Throughout his career, Henderson was part of a consistent circle of Montreal-based voice actors, frequently collaborating with performers such as Sonja Ball, Richard Dumont, and Walter Massey, as well as producers like Ronald A. Weinberg and Micheline Charest. He also made occasional on-camera appearances, including a role in the television series Are You Afraid of the Dark?. His career demonstrated a long-standing commitment to voice work in Canada, contributing to the sound of numerous animated and dubbed productions for several decades.