Justin Shenkarow (born October 17, 1980) is an American actor best known for his roles of Matthew Brock in Picket Fences, Simon Holmes in Eerie, Indiana, and the voice of Harold Berman on Hey Arnold!.

His work for Disney included additional voices in The Emperor's New School, Eric Lyndon and the guards in W.I.T.C.H., Dexter in Kim Possible, Gelman in Recess, Soldier Kid and Wrestler Kid in Recess: School's Out, Eddie Horton in Lloyd in Space, Patch in 101 Dalmatians: The Series, Dave Porter in Gargoyles and Daniel in The Little Mermaid.