Athetis thoracica is a moth of the family Noctuidae.

It is now present on Kauai, Oahu, Molokai, Maui and Hawaii.

Larvae have been recorded on Commelina, Ipomoea, Syzygium, Portulaca, Nicotiana, Camellia and unspecified Gramineae and Leguminosae species.

It is 13–15 mm long and uniform medium brown.

The name Athetis nonagrica has been applied consistently to specimens that are in fact the more widespread species Athetis thoracica.