Donacaula nitidellus is a moth in the family Crambidae.

It was described by Harrison Gray Dyar Jr. in 1917.

[1] It is found in North America, where it has been recorded from Alberta, Alabama, Connecticut, Georgia, Maryland, Massachusetts, Mississippi, New Jersey, New York, North Carolina, South Carolina and Texas.

The female hindwings are yellowish white, always without the grey line.

[2] Adults have been recorded on wing from April to December.