Crambus watsonellus, or Watson's grass-veneer, is a moth in the family Crambidae.

It was described by Alexander Barrett Klots in 1942.

[1] It is found in North America, where it has been recorded from Florida, Illinois, Maine, Michigan, Ohio, Oklahoma and Ontario.

[2] The habitat consists of marshy areas.

This article relating to the moth tribe Crambini is a stub.