Dubyago is a lunar impact crater that lies in the eastern limb of the Moon.

It lies along the southern shore of the Mare Undarum, to the southeast of the crater Firmicus.

The most notable aspect of this crater, however, is the dark hue of the interior floor which matches the albedo of the lunar mare to the northwest.

Dubyago has an unusual number of satellite craters, several of which have since been given names by the IAU.

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