Iharkutosuchus ("Iharkút crocodile", after where it was found) is an extinct genus of basal eusuchian crocodyliform. Its fossils have been found in the Santonian-aged (Late Cretaceous) Csehbánya Formation in the Bakony Mountains of western Hungary.
Iharkutosuchus is based on MTM 2006.52.1, a nearly complete skull, but several other partial skulls, isolated skull bones, and numerous teeth are also known. It was a small crocodyliform, with a skull length up to , and estimated body length of . Its skull was low, and the snout was short. Iharkutosuchus is unusual in its heterodonty: some of its teeth were complex and multicusped, like mammal teeth. The structure of the skull indicates that it could grind food with a mobile lower jaw, an inference corroborated by the extensive horizontal wear facets on its teeth, and together with the teeth suggest a diet of fibrous plant material. The enamel structure of Iharkutosuchus was convergent with mammalian Hunter-Schreger bands, suggesting a similar evolutionary pressure caused it to develop traits for efficient mastication.
The genus was described in 2007 by Attila à Âsi and colleagues. The type species is I. makadii, named for László Makádi. A 2011 phylogenetic study recovered Iharkutosuchus as a member of the Hylaeochampsidae, a group of basal eusuchians, as shown in the cladogram below.