Mandelʹshtam is the remains of a large crater on the Moon's far side named after Leonid Mandelstam.

The outer rim of this crater has been battered into near ruin, with sections forming only an irregular circular rise in the surface.

Much of the rim consists of clefts, small craters, and ridges.

The crater was named after Soviet geophysicist and geodesist Leonid I. Mandelʹshtam by the IAU in 1970.

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