Cyperus hesperius is a sedge of the family Cyperaceae that is native to Australia.

The perennial sedge typically grows to a height of 0.3 to 0.4 metres (1.0 to 1.3 ft) and has a tufted habit and produces yellow-brown flowers.

In Western Australia it is found on rocky hillsides in the Pilbara region where it grows in red sandy-loamy soils.

The species was first described in 1991 by Karen Wilson. There are no synonyms.

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