Magelhaens is a lunar impact crater that lies along the southwestern edge of the Mare Fecunditatis, in the eastern part of the Moon's near side.

[1] It lies to the south-southwest of the crater Goclenius, about midway between Gutenberg to the northwest and Colombo to the southeast.

The slightly smaller satellite crater Magelhaens A is attached to the southeastern rim.

Within the inner walls of Magelhaens, the interior floor has been resurfaced by basaltic lava, matching the same dark appearance as the lunar mare to the northeast.

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