Patagonykus (meaning "Patagonian claw") is a genus of theropod dinosaur from the Upper Cretaceous of Argentina.

The holotype consists of an incomplete but well-preserved skeleton, lacking a skull, but including many vertebrae, the coracoids, a partial forelimb, pelvic girdle, and hindlimbs.

[2] Makovicky, Apesteguía and Gianechini (2012) found it to be in a polytomy with Alnashetri, Bonapartenykus, and a clade containing more deeply nested taxa such as Linhenykus, Mononykus and Albinykus.

[5] Aorun Haplocheirus Tugulusaurus Xiyunykus Bannykus Bonapartenykus Patagonykus Achillesaurus Alvarezsaurus Albertonykus Shuvuuia Ceratonykus Kol Linhenykus Mononykus Trierarchuncus Parvicursor Albinykus Xixianykus The results of an earlier analysis by Agnolin et al. (2012) are reproduced below.

[2] Patagonykus Bonapartenykus Alvarezsaurus Ceratonykus Xixianykus Albinykus Parvicursor Albertonykus Mononykus Linhenykus Shuvuuia