赤羊（学名：Ovis orientalis vignei）又称东方盘羊，是一种中等身型的野生羊，并分类为羊亚科之一。赤羊特别之处是牠们那赤红色的毛会于冬天褪色。雄性赤羊有着黑色的环状领从颈部至胸部及那对很大的角。

雄性赤羊有着大角，在头顶向外弯曲至头后；雌性赤羊的角则较短及扁平。雄性赤羊的角可以生长至1米高。平均成年赤羊肩高为80-90厘米。

赤羊生活在俄罗斯、巴基斯坦、印度及中亚洲的山区。牠们的栖息地包含低于树带界线的草原斜坡。赤羊很少在山上的岩石区域出现。牠们以草为主要食粮，但如有需要亦可以吃树叶。

The urial (Ovis orientalis vignei), also known as the arkars or shapo, is a subspecies group of the wild sheep Ovis orientalis. Noticeable features are the reddish-brown long fur that fades during winter; males are characterized by a black ruff stretching from the neck to the chest and large horns. It is found in western central Asia. The other subspecies group of O. orientalis is the mouflon (Ovis orientalis orientalis group). The two groups have often been considered separate species.