Orocrambus ramosellus is a moth in the family Crambidae.

[2][3] It is endemic to New Zealand,[4] where it has been recorded in the North and South Islands.

[5] The habitat of this species consists of pastures.

Adults have been recorded on wing from October to July.

[5] The larvae feed on Festuca novaezealandiae, Poa cita (formerly Poa caespitosa), Agrostis tenuis, Alopercus pratensis, Bromus catharticus and Poa annua.