Jason Klassi is an American voice actor and scriptwriter known for his work in English dubs of anime and animated series during the 1980s. His career is closely associated with the early days of anime localization in the United States, particularly for productions by Streamline Pictures and Harmony Gold.

Klassi's most recognized voice role is Aramis in the English adaptation of the Spanish-Japanese animated series Dogtanian and the Three Muskehounds. He provided the voice for one of the three musketeer dogs in this series, which was based on the novel by Alexandre Dumas.

His voice acting credits also include a wide range of roles in the influential hybrid series Robotech. In this production, he voiced numerous background and supporting characters, such as Karno, various Zentraedi soldiers, and other incidental roles across multiple episodes. He was also part of the casts for Streamline Pictures dubs of the era, lending his voice to the films Megazone 23 and Wicked City. Additional voice work includes parts in the Harmony Gold dub of The Super Dimension Fortress Macross.

Beyond voice acting, Klassi contributed to the adaptation of several animated series as a writer. He worked on script adaptation for Dogtanian and the Three Muskehounds, collaborating with other writers such as Tom Wyner and Robert Barron. He also has writing credits for the anime series GoShogun and served as a staff writer on Robotech.

Klassi's filmography includes occasional live-action acting roles in films such as The Thing Called Love and Phantom Halo, though his primary body of work remains within voiceover for animation.