Diuqin (meaning "bird of prey") is an extinct genus of unenlagiine theropod dinosaurs from the Late Cretaceous (Santonian) Bajo de la Carpa Formation of Argentina.

The Diuqin holotype specimen, MUCPv 1401, was discovered in sediments of the Bajo de la Carpa Formation in Neuquén Province of Argentinian Patagonia.

[1] Diuqin is known from the Bajo de la Carpa Formation, which dates to the Santonian age of the late Cretaceous period.

Many other dinosaurs are known from the formation, including several other non-avian theropods (the alvarezsauroids Alvarezsaurus and Achillesaurus, the abelisaurs Velocisaurus, Viavenator, and Llukalkan, and the megaraptoran Tratayenia), many titanosaurian sauropods (Bonitasaura, Inawentu, Overosaurus, Rinconsaurus, and Traukutitan), birds (Neuquenornis, Patagopteryx, and some eggs and nests), the ornithopod Mahuidacursor, and an indeterminate ankylosaur.

[2][3] Other animals include snakes (Dinilysia), lizards (Paleochelco), turtles (Lomalatachelys), crocodyliforms (Comahuesuchus brachybuccalis, Cynodontosuchus, Gasparinisuchus, Kinesuchus, Microsuchus, Neuquensuchus, Notosuchus, and Wargosuchus), and indeterminate pterosaurs.