Centrotus cornutus (thorn-hopper) is a species of 'treehoppers' belonging to the family Membracidae. This species is present in most of Europe, in eastern Palearctic ecozone and in the Near East. The adults reach 7–10 millimetres (0.28–0.39 in) of length, while females are slightly larger. They can be encountered from early May through early August in moderately moist or in dry habitats.