There are three subgenus chipmunk, two of which consist of only one species: - subgenus Neotamias
1. Merriam's Chipmunk (Tamias merriami), Southern California
2. California Chipmunk (Tamias obscurus), Southern and lower California
3. Alpine Chipmunk? (Tamias alpinus), Sierra Nevada
4. Palmer's Chipmunk (Tamias palmeri), Southern Nevada
5. Durango Chipmunk (Tamias durangae), Durango, Chihuahua, Coahuila de Zaragoza
6. Sonoma Chipmunk (Tamias sonomae), Northwest California
7. Townsend's Chipmunk (Tamias townsendii), Washington, Oregon
8. Gray-collared Chipmunk (Tamias cinereicollis), Arizona, New Mexico
9. Allen's Chipmunk (Tamias senex), Oregon, northern California
10. Yellow-cheeked Chipmunk (Tamias ochrogenys), North Coast of California
11. Long-eared Chipmunk (Tamias quadrimaculatus), Sierra Nevada
12. Gray-footed Chipmunk (Tamias canipes), New Mexico
13. Yellow-pine Chipmunk (Tamias amoenus), British Columbia, north-west USA
14. Red-tailed Chipmunk (Tamias ruficaudus), British Columbia, Washington, Montana
15. Lodgepole Chipmunk (Tamias speciosus), Sierra Nevada
16. Least Chipmunk (Tamias minimus), western and central Canada, western U.S.
17. Panamint Chipmunk (Tamias panamintinus), south-eastern California, western Nevada
18. Colorado Chipmunk (Tamias quadrivittatus), center and west of U.S.
19. Hopi Chipmunk (Tamias rufus), Utah, Arizona
20. Cliff Chipmunk (Tamias dorsalis), center and west of the USA, northwest Mexico
21. Uinta Chipmunk (Tamias umbrinus), east of California, northern Arizona and Colorado
22. Buller's Chipmunk (Tamias bulleri), Durango, Zacatecas, Jalisco
23. Siskiyou Chipmunk (Tamias siskiyou), southwest Oregon
24. Michigan Chipmunk (Tamias arborus), Midwest, Michigan
- subgenus Tamias
25. Eastern Chipmunk (Tamias striatus), east of North America