Horusornis is a prehistoric bird of prey in the order Accipitriformes. Its name means "Horus-bird", after the Egyptian god Horus who was sometimes depicted as a falcon.

Horusornis vianeyliaudae is the only known species. It lived approximately at the end of the Eocene, some 35 mya in what today is France. Its fossils were found in Quercy.

• Mourer-Chauviré, C. (1991) Les horusornithidae nov. fam., accipitriformes (Aves) a articulation intertarsienne hyperflexible de l'éocene du Quercy. Geobios, 24:183-192