半羊属（学名：Hemitragus），又译塔尔羊属，是牛科羊亚科羊族之下的一个已废弃的属级分类。当初本属之下三个物种由于外形相近，被认为应该属于同属物种；但现在透过基因图谱分析，我们知道三个物种有亲属关连，但有各自的演化支。因此而时分开成为下列三个独立的属：

这三个属与羊族余下的四个属（即：羊属 Ovis、蛮羊属 Ammotragus、岩羊属 Pseudois、山羊属 ''Capra）并列在一起。而原来的拉丁学名，现时专指数量最多的喜马拉雅塔尔羊属。

Tahrs are three species of large Asian ungulates related to the wild goat. Until recently the three species were believed to be closely related and were placed in a single genus, Hemitragus. Genetic studies have proven that the three tahrs are not as closely related as previously thought. Now they are considered as members of three separate monotypic genera; Hemitragus is now reserved for the Himalayan Tahr; Nilgiritragus for the Nilgiri Tahr; and Arabitragus for the Arabian Tahr.