阿拉瓜亚河（Rio Araguaia），是巴西的主要河流之一，位于巴西中部。该河流总长度2,627公里。“阿拉瓜亚”在图皮语中意为“金领鹦鹉河”。该河发源于上阿拉瓜亚城附近，在圣若昂汇入托坎廷斯河。阿拉瓜亚河流向为由南向北。

The Araguaia River (Portuguese:Rio Araguaia [ˈʁi.u ɐɾɐˈɡwaj.jɐ]) is one of the major rivers of Brazil, and the principal tributary of the Tocantins, though it is almost equal in volume at its confluence with the Tocantins. It has a total length of approximately 2,627 km. Araguaia means "river of (red) macaws" in the Tupi language.