Nassau is a lunar impact crater on the Moon's far side.

It abuts against the northeastern rim of the figure-8-shaped crater Van de Graaff.

To the southeast of Nassau lies the crater Leeuwenhoek, and to the east is Orlov.

Along the southwestern inner wall, where the crater joins Van de Graaff, a ridge of material extends northward part way into the interior floor.

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