Orocrambus lewisi is a moth in the family Crambidae.[1] It was described by David E. Gaskin in 1975.[2] It is endemic to New Zealand,[3] where it has been recorded from the South Island, Stephens Island and the south-west tip of the North Island.
The wingspan is 28–30 mm. Adults have been recorded from October to March.
The larvae feed on Poa cita (formerly Poa caespitosa).