Gardner is a small lunar impact crater in the northeast part of the Moon.

[1] It lies due east of the crater Vitruvius, in a section of rough terrain north of the Mare Tranquillitatis.

Gardner was previously designated Vitruvius A before being given its present name by the IAU.

The southern half of the floor has a slight rise before reaching the inner wall.

The most distinctive feature is a row of four rounded hills along the northern floor of the crater.