Autolycus is a lunar impact crater that is located in the southeast part of Mare Imbrium.

The crater is named after the ancient Greek astronomer Autolycus of Pitane.

Just to the north is Aristillus, and the outer ramparts of these two craters overlap in the intermediate stretch of the lunar mare.

Aristillus (to the north), however, has rays that overlay both Autolycus and Archimedes, and thus it is the youngest of the three craters.

By convention these features are identified on lunar maps by placing the letter on the side of the crater midpoint that is closest to Autolycus.