尖角龙属（学名：Centrosaurus）是角龙科恐龙的一属，是种草食性动物，生活于上白垩纪的北美洲。化石发现于加拿大亚伯达省的恐龙公园组（Dinosaur Park Formation）地层，距今约7650万到7550万年前。

属名在古希腊文意指「尖刺蜥蜴」，centron(κεντρον)意思是「尖刺的」，而sauros(σαυρος)意为「蜥蜴」。属名是指牠头盾周围的小型角，而非牠鼻端上的角（在命名时仍未知道鼻角的存在）。其属名易与钉状龙（Kentrosaurus）混淆，两者来自于相同的希腊文本源，但尖角龙前缀改为"C"，以避免混淆。

Centrosaurus (/ˌsɛntroʊˈsɔːrəs/ SEN-tro-SAWR-əs) is a genus of herbivorous ceratopsian dinosaurs from the late Cretaceous of Canada. Their remains have been found in the Dinosaur Park Formation, dating from 76.5 to 75.5 million years ago.

The name Centrosaurus means "pointed lizard" (from Greek kentron, κέντρον, "point or prickle" and sauros, σαῦρος, "lizard"), and refers to the series of small hornlets placed along the margin of their frills, not to the nasal horns (which were unknown when the dinosaur was named). The genus is not to be confused with the stegosaur Kentrosaurus, the name of which is derived from the same Greek word.