Simon is a chipmunk in Alvin and the Chipmunks. He's the smartest and oldest of the chipmunks and his brothers are Alvin and Theodore. His chipette counterpart is Jeanette. He and his brothers appeared with Pooh and Tigger in Cartoon All-Stars to the Rescue.
- Simon was voiced by Ross Bagdasarian, Sr., and now he's voiced by his son, Ross Bagdasarian, Jr. They both also voice/voiced Alvin. He is also voiced by Matthew Gray Gubler in the live-action film series.