Damoiseau is a lunar impact crater that is located just to the west of the Oceanus Procellarum, in the western part of the Moon's near side.
It lies due east of the prominent crater Grimaldi, a walled plain with a distinctive dark floor.
The low outer rim of Damoiseau is not quite circular, having an outward protrusion to the northeast and smaller bulges to the north and southeast.
This outer feature is missing a rim to the northeast where it intersects the lunar mare.
By convention these features are identified on lunar maps by placing the letter on the side of the crater midpoint that is closest to Damoiseau.