Henry Mandell is a voice actor known primarily for his work on the 1980s animated space western series The Adventures of the Galaxy Rangers. As the brother of the show's creator, Robert Mandell, he had a significant presence in the series, voicing a wide range of characters across its run. His roles on The Adventures of the Galaxy Rangers include Crown Agent, Geezi the Pedulont, Ryker Kilbane, Scarecrow, Larry, Q Ball, and Waldo.

Mandell's involvement with The Adventures of the Galaxy Rangers extended beyond voice acting. He participated in audio commentaries for selected episodes on the series' DVD releases, discussing the challenge of voicing numerous characters. His other known voice credits are from the mid-1990s, including additional voices for the film Ace Ventura and a role in the series Princess Starla and the Jewel Riders, though his work on The Adventures of the Galaxy Rangers remains his most documented and significant contribution.