Jon Allen is an American voice actor known for his extensive work in English dubs of anime series and video games. Born on August 20, 1982, he began his voice acting career in 2001 and has since built a diverse portfolio across animation, comedy, and live performance. In addition to voice acting, Allen is a comedian and on-camera actor, having studied improv at the Groundlings School and stand-up comedy. He is also the lead singer of a band called Bonehenge.

Within the anime industry, Allen has contributed voices to a wide array of characters. In the rugby anime series number24, he voiced the character Ren Tamashiro. His involvement with the series also included providing voices for additional roles, such as club members and a referee, which is a common practice for voice actors in dubbed productions. He is also recognized for his role as Critter, a hacker consultant and minor antagonist in the Sword Art Online: Alicization - War of Underworld arcs. He first voiced the character in the second episode of the War of Underworld arc and continued in subsequent parts. Another notable role is AC1677, one of the primary red blood cell characters in the darker spin-off series Cells at Work! Code Black, where he starred opposite Kyle McCarley.

Beyond the specific roles noted, Allen's anime filmography is extensive and includes appearances in major franchises. He has voiced characters in long-running series such as Hunter x Hunter, where he played Number Zero and other roles, and in JoJo's Bizarre Adventure as Alessi. His credits also include Mob Psycho 100, Dragon Ball Super, Kakegurui, Kuroko's Basketball, and Mobile Suit Gundam: Iron-Blooded Orphans. In addition to these, he has contributed to the English casts of Edens Zero and Cyberpunk: Edgerunners. Allen's voice is also featured prominently in video games, with credits including Genshin Impact, Pokemon Masters, Phantasy Star Online 2, and Ace Combat 7.

While his work in anime is significant, Allen has also gained wider recognition for his role in Western animation. He is the current voice of Mr. Poopybutthole in the popular series Rick and Morty, taking over the role from Justin Roiland in season seven. His career is marked by versatility across different genres and media, demonstrating a sustained presence in the voice acting industry since the early 2000s.