Turner is a small lunar impact crater that lies in the Mare Insularum, near the Moon's equator.

The crater was named after British astronomer Herbert Hall Turner.

Turner is a circular, cone-shaped crater with inner walls that slope down to the midpoint.

A similar-sized ghost crater is attached to the western rim, its interior floor submerged by lava and the surviving rim broken in the southwest.

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