阿拉斯河（亚美尼亚语：Արաքս，，波斯语：ارس‎，土耳其语：Aras Nehri）是中亚高加索地区的河流，流经土耳其、阿美尼亚、阿塞拜疆和伊朗，河道全长1,072公里，流域面积102,000平方公里，为库拉河的最大支流。

The Aras (Persian: ارس‎‎), also known as Araks or Arax (Armenian:Արաքս), Yeraskh (Classical Armenian:Երասխ), Rakhsi (Old Georgian: რახსი), Erez (İn Kurdish), Araxes (Greek:Αράξης), Aras (in Turkish) Araz (in Azerbaijani), is a river in and along the countries of Turkey, Armenia, Azerbaijan, and Iran. It drains the south side of the Lesser Caucasus Mountains and then joins the Kura River which drains the north side of those mountains. Its total length is 1,072 kilometres (666 mi). Given its length and a basin that covers an area of 102,000 square kilometres (39,000 sq mi), it is one of the largest rivers of the Caucasus.