Lorentz is a huge lunar impact crater that lies just beyond the northwest limb of the Moon, in a region that is brought into sight of the Earth during favorable librations.

Sections of the crater floor are, however, relatively level, particularly an arc along the western rim.

The remainder of the interior is rough and irregular, and marked with a multitude of impacts.

Lorentz contains a prominent crater pairing, with Nernst located just to the north of Lorentz's midpoint, and Röntgen attached to the southeastern rim of Nernst.

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