Oksoko (Oak-soak-oh; from Öksökö, a mythical bird of Yakut folklore) is a genus of oviraptorid dinosaur from the Late Cretaceous of Asia, that lived in what is now the Nemegt Formation in Mongolia.

Both specimens share taphonomical traits, such as the death pose, sediments and preservation state, which may suggest that MPC-D 102/11 is part of the holotype block assemblage.

[1] Another, isolated specimen was collected in 1998 at the Guriliin Tsav locality by a joint expedition from the Hayashibara Museum of Natural Sciences and the Mongolian Palaeontological Centre.

This block was in 2006 confiscated from poachers by the General Intelligence Agency of Mongolia along with a fourth specimen, MPC-D 102/11, representing a partial juvenile skeleton preserving the skull.

The generic name, Oksoko, is derived from Öksökö, one of the multiple triple-headed eagles in the Altaic mythologies, in reference to the holotypic block assemblage preserving three skulls.

Their cladogram is shown below (only relationships within Oviraptoridae are shown):[1] Nankangia Oviraptor Yulong Wulatelong Rinchenia Tongtianlong Ganzhousaurus Citipati Zamyn Khondt oviraptorid Huanansaurus Corythoraptor Shixinggia Khaan Conchoraptor Machairasaurus Nemegtomaia Heyuannia huangi Heyuannia yanshini Banji Jiangxisaurus Oksoko Oksoko was found in the Nemegt Formation, one of the most productive fossil sites in Mongolia.