Cnaphalocrocis hexagona is a moth in the family Crambidae.

It is found in Australia, where it has been recorded from Queensland[1] and the Northern Territory.

The forewings are pale brassy-yellow, with fuscous markings.

There is a fine slightly outwardly curved line from one-fourth of the costa to one-fourth of the inner margin and a second from beneath the costa in the middle, curved outwards and slightly sinuate beneath, ending on the inner margin about the middle.

There is a faint fuscous subterminal shade and a fine line along the termen.