Champsosaurus is an extinct genus of crocodile-like choristodere reptile, known from the Late Cretaceous and early Paleogene periods of North America and Europe (Campanian-Paleocene). The name Champsosaurus is thought to come from χαμψαι (champsai) (said in an Ancient Greek source to be an Egyptian word for "crocodiles"), and σαύρος (sauros) (Greek for "lizard"). The morphology of Champsosaurus resembles that of gharials, with a long, elongated snout. It was native to freshwater environments where it likely preyed on fish, similar to living gharials.