Bannykus is an alvarezsaur from the Early Cretaceous of the Bayin-Gobi Formation of Inner Mongolia, China.

It is large for an alvarezsaur, with an estimated weight of 24 kg based on femoral circumference.

The holotype comes from the Bayin-Gobi Formation in Chaoge, Wulatehouqi, Inner Mongolia, China.

The specific name refers to Wulatehouqi (Wulate Rear Banner), the county that the holotype was found in.

[1] Bannykus, along with Xiyunykus, fills a 70-million year gap in alvarezsaur evolution by exhibiting morphologies intermediate between the typical theropod forelimb of Haplocheirus and the highly reduced forelimbs and minute teeth of Late Cretaceous alvarezsaurids.