The Colorado chipmunk (Neotamias quadrivittatus) is a species of chipmunk in the squirrel family Sciuridae. It is endemic to Colorado, Utah, Arizona and New Mexico in the United States.
It can be found most often in coniferous forests, woodlands, montane shrub lands, and alpine tundra habitats. This means that in elevation, T. quadrivittatus inhabits anywhere above 1500 m and below 2200 m elevation.
This western American dweller is the largest of the three species of chipmunks found in the Colorado Front Range (which also include the Least Chipmunk and the Uinta Chipmunk). On average it weighs about . Chipmunks are distinguished from ground squirrels in that their faces have a stripe going across under the eye. There are no dimorphic differences between males and females.
Their vocalizations are essential for defending their territories.