Erro is a lunar impact crater that lies beyond the eastern limb of the Moon, on the far side as seen from the Earth.

Nearby craters of note include Babcock to the west-southwest, Saenger to the east-southeast and Dreyer to the north-northwest.

[1] This crater has a low, broken rim that only projects a small distance above the surface.

The somewhat uneven surrounding plains have intruded into the interior of this crater, leaving a level, nearly featureless 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 Erro.