Grimser's collared lizard (Crotaphytus grismeri ) is a species of lizard in the family Iguanidae. The species is endemic to Baja California, Mexico.
The specific name, grismeri, is in honor of American herpetologist Larry Lee Grismer.
In Baja California, C. grismeri is found in the Sierra de Los Cucapah and the contiguous Sierra El Mayor.
C. grismeri is oviparous.