João Duarte Costa is a Portuguese voice actor and dubbing artist. He is known for his work in the Portuguese dubbing of various animated series and films.

His career includes a significant number of roles in dubbing, with a particular focus on animation. He provided the Portuguese voice for several characters in the Netflix animated series Dino Girl Gauko. In this series, he voiced both the character KinPika and the character Pai da Naoko, who is the father of the main character. His other roles in the series include Professor R3 and Bibilian, demonstrating his range in voicing multiple characters within a single production.

Beyond Dino Girl Gauko, Costa's dubbing work spans numerous other projects. In film, he voiced an employee in the Portuguese version of the Disney Pixar film Coco in 2017. His television dubbing credits are extensive and include roles such as Alistair Smythe in Marvel's Spiderman, Chris Kratt in Os Manos Kratts, Chad Dylan Cooper in So Random!, and Ringo in Screechers Wild. He also voiced the title character in the series Agente Binky.

Costa's career demonstrates a sustained involvement in the field of dubbing, with credits dating back to at least 1997 for the series Mortadelo e Filemón and continuing through 2020. His work is characterized by versatility, taking on lead roles, supporting characters, and multiple parts in the same show.