What is the name of the fictional county where Radiator Springs is located in Pixar's Cars?

Radiator Springs is located in fictional Carburetor County in Pixar's Cars.

The small desert town is the film's main setting and sits along the historic Route 66. Lightning McQueen reaches it after accidentally damaging the road and being ordered to repair it. His enforced stay introduces him to Mater, Sally Carrera, Doc Hudson, and the rest of the town's residents.

Carburetor County is a fictional location designed around automotive wordplay. It should not be confused with the real places that inspired the visual character of Radiator Springs, including Route 66 communities in Arizona and other American Southwest locations. The county name is a detail from the Cars setting, while Route 66 is the real historic highway associated with the town's broader inspiration.