塔亚河是欧洲中部的河流，属于摩拉瓦河的支流，河道全长235公里，流域面积13,419平方公里，流经奥地利的下奥地利州和捷克的南摩拉维亚州。

The Thaya (Czech:Dyje [ˈdɪjɛ]) is a river in Central Europe, the longest tributary to the Morava River. It is about 235 km (311 km with its longest source) long and meanders from west to east in the border area between Lower Austria (Austria) and South Moravia (Czech Republic), though the frontier does not exactly follow the river's course in most parts. Its source is in two smaller rivers, namely the German Thaya (Deutsche Thaya) and the Moravian Thaya (Czech:Moravská Dyje, German:Mährische Thaya), flowing together at Raabs.