Catharina is an ancient lunar impact crater located in the southern highlands. It lies in a rugged stretch of land between the Rupes Altai scarp to the west and Mare Nectaris in the east. To the west-northwest is Tacitus crater, and the lava-flooded Beaumont crater lies to the east along the shore of Mare Imbrium.

The Catharina was a barque, built 1810 in Kiel, and weighing 350 tons.