Steve Cassling, born Steven Arthur Cassling on June 4, 1962, is an American voice actor known for his work in anime dubbing and live-action dubbing. He has worked extensively with several Los Angeles-based dubbing studios, including Animaze, Studiopolis, and Bang Zoom! Entertainment. Prior to his voice acting career, Cassling studied Theatre Performance at Boston University and was a member of the acting company at the Alley Theatre in Houston, Texas.

Cassling has built a career with numerous supporting and guest roles in anime series and films. Among his notable anime roles is Edward in the series MÄR. He also provided the voice of Kentaro Sakata in Love Hina and Tatanka in Vandread: The Second Stage. Other anime credits include roles in Cowboy Bebop as Macintyre, Ghost in the Shell: Stand Alone Complex as an investigator and a NARC Squad marine, and Trigun as a bar patron. In the OVA format, he voiced Masaki Murakami in The Guyver: Bio-Booster Armor.

Throughout his career, Cassling has been a frequent collaborator with other voice actors, having worked with Steve Blum on a number of projects. In addition to his anime work, Cassling has contributed additional voices to several live-action dubs for international series and films, including Money Heist and Lupin.

One of Cassling's most recognized roles is providing the English voice for the fighting game character Ken Masters in the Fighter Alpha: Generations. This film served as a prequel to the Street Fighter Alpha game series and featured Cassling voicing the character alongside Richard Cansino as Ryu.