Theophrastus is a small lunar impact crater at the southern part of the Sinus Amoris, a bay at the northeast part of the Mare Tranquillitatis. It lies to the southeast of the lava-flooded Maraldi crater, and was designated 'Maraldi M' until the IAU gave this formation its current name. Just to the southeast of Theophrastus is the flooded Franz crater.

This is a circular crater, with inner walls that slope down to the mid-point and a rim that rises slightly above the surrounding lunar mare. The crater has nearly the same low albedo as the nearby surface. It has no other distinctive features, and is not significantly eroded.

"Ancient Greeks on the Moon"