Hagryphus (meaning "Ha's griffin") is a monospecific genus of caenagnathid dinosaur from southern Utah that lived during the Late Cretaceous (upper Campanian stage, 75.95 Ma) in what is now the Kaiparowits Formation of the Grand Staircase–Escalante National Monument.

[1] The holotype was discovered in 2002 by Michael Getty in the Kaiparowits Formation (Late Campanian) in the Grand Staircase–Escalante National Monument of southern Utah.

[4] Designated UMNH VP 12765, the type specimen resides in the collections of the Utah Museum of Natural History in Salt Lake City.

Oviraptorosaurs are characterized by a shortened snout, massive edentulous jaws and extensively pneumatized skulls, often sporting elaborate crests, the function of which remains unknown.

[5] Microvenator celer Gigantoraptor erlianensis Anomalipes zhaoi Chirostenotes pergracilis Hagryphus giganteus Nomingia gobiensis Citipes elegans Elmisaurus rarus Apatoraptor pennatus Caenagnathasia martinsoni Epichirostenotes curriei Anzu wyliei Caenagnathus collinsi The results of an earlier analysis by Funston & Currie (2016) are reproduced below.

Argon-argon radiometric dating indicates that the Kaiparowits Formation was deposited between 76.1 and 74.0 million years ago, during the Campanian stage of the Late Cretaceous period.

The plateau where dinosaurs lived was an ancient floodplain dominated by large channels and abundant wetland peat swamps, ponds and lakes, and was bordered by highlands.

[10] Hagryphus shared its paleoenvironment with theropods such as dromaeosaurids, the troodontid Talos sampsoni, ornithomimids like Ornithomimus velox, tyrannosaurids like Albertosaurus and Teratophoneus, armored ankylosaurids, the duckbilled hadrosaurs Parasaurolophus cyrtocristatus and Gryposaurus monumentensis, and the ceratopsians Utahceratops gettyi, Nasutoceratops titusi and Kosmoceratops richardsoni.