Sigaus is a genus of grasshoppers in the tribe Catantopini that is endemic to New Zealand. All but one Sigaus species is endemic to the South Island: Sigaus piliferus is the only North Island representative and is the type species. Most species in this genus are restricted to alpine habitats. All are wingless and make no sounds.

There are thirteen species in the genus all are adapted to cold conditions, and many are coloured for camouflage against rocky ground. The largest species Sigaus villosus can reach 48mm (body length of adult female). The smallest species Sigaus minutus and S. childi are threatened with extinction.

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