O. atricapillus O. beecheyi O. variegetus Otospermophilus is a genus of ground squirrels in the family Sciuridae, containing three species from Mexico and the United States.

Otospermophilus was formerly placed in the large ground squirrel genus Spermophilus, as a subgenus or species group.

Since DNA sequencing of the cytochrome b gene has shown Spermophilus to be paraphyletic to the prairie dogs and marmots,[2] it is now separated, along with six other genera.

These are the same species that were previously grouped in the subgenus Otospermophilus.

This ground squirrel article is a stub.