Carex mandoniana is a tussock-forming species of perennial sedge in the family Cyperaceae.

It is native to western parts of South America.

[1] The species was first formally described by the botanist Johann Otto Boeckeler in 1896 as a part of the work Allgemeine Botanische Zeitschrift für Systematik, Floristik, Pflanzengeographie.

The type specimen was collected by Gilbert Mandon in 1859 in Bolivia.

[2] This Carex article is a stub.