Acheroraptor is an extinct genus of dromaeosaurid theropod dinosaur known from the latest Maastrichtian Hell Creek Formation of Montana, United States.

The generic name is derived from the Greek Ἀχέρων, Acheron, "underworld", in reference to the provenance from the Hell Creek Formation, and the Latin raptor, "thief".

The specific name honours James and Louise Temerty, the chairman of Northland Power and the ROM Board of Governors and his wife, who have supported the museum for many years.

Both specimens were collected approximately four metres from one another, from the same mixed faunal bonebed that occurs in the upper part of the Hell Creek Formation of Montana, dating to the latest Maastrichtian stage of the Late Cretaceous, immediately prior to the Cretaceous–Paleogene extinction event.

Both specimens of Acheroraptor were coded as a single taxon into Turner et al. (2012) data matrix, an extensive phylogenetic analysis of theropods that focuses on maniraptorans.

[1] Evans et al. (2013) also coded the specimens of Acheroraptor (together and separately) into an updated version of the smaller, dromaeosaur-specific dataset from Longrich and Currie (2009).

[1] Unenlagia paynemili Hesperonychus elizabethae Velociraptor osmolskae A 2022 study of eudromaeosauria reclassified Acheroraptor as a derived member of Saurornitholestinae, with Atrociraptor as its sister taxon.

[13] Hadrosaurs are common in the Hell Creek Formation, and are known from multiple species of the ornithopod Thescelosaurus, and the hadrosaurids Edmontosaurus,[6][14] and an undescribed genus similar to Parasaurolophus.

The multituberculates represented include Paracimexomys,[16] the cimolomyids Paressonodon,[17] Meniscoessus, Essonodon, Cimolomys, Cimolodon, and Cimexomys; and the neoplagiaulacids Mesodma, and Neoplagiaulax.

The alphadontids Alphadon, Protalphodon, and Turgidodon, pediomyids Pediomys,[16] Protolambda, and Leptalestes,[18] the stagodontid Didelphodon,[16] the deltatheridiid Nanocuris, the herpetotheriid Nortedelphys,[17] and the glasbiid Glasbius all represent metatherians of the Hell Creek Formation.