Dr. Zin may refer to the following:
- Dr. Zin: The standard continuity character.
- Dr. Napoleon Zin: The incarnation of the character in the Jonny Quest Comico comic book series.
- Dr. Zin: The incarnation of the character in the TV films Jonny's Golden Quest and Jonny Quest Versus the Cyber Insects.
- Dr. Zin: The incarnation of the character in the 1996 TV series The Real Adventures of Jonny Quest.
- Dr. Zin: The incarnation of the character from the TV series Scooby-Doo! Mystery Incorporated.
- Dr. Zin: The incarnation of the character from the 2015 direct-to-DVD movie Tom and Jerry: Spy Quest.
- Dr. Archimedes Zin: The incarnation of the character from the Future Quest comic.