Lallemand is a small lunar impact crater that lies near the western limb of the Moon, in a region where the visibility is affected by libration effects.

It lies in the northeast part of a mountain range named the Montes Rook that forms a ring around the enormous Mare Orientale impact basin.

This is a roughly circular, bowl-shaped crater that lies along the northeastern edge of the Montes Rook.

This crater was previously designated Kopff A before being named for French astronomer André Lallemand by the IAU in 1985.

[1] Kopff is located to the southwest along the eastern edge of the Mare Orientale.