Like every South Park character, Eric Cartman's eyes are black in the main series. In the original mini-cartoons they were brown.
- In season 3 episode 3, "The Succubus", it is implied that Kenny's eyes were transplanted into Cartman's head. Since Kenny's eyes are blue ("Starvin Marvin"), Cartman's eyes could also be blue.
- In season 17 episode 9, "Titties and Dragons", the anime version of the Grand Wizard King Cartman (shown from Kenny's perspective) has blue eyes.