巴伊斯河是法国的河流，位于该国西南部，属于加龙河的左支流，河道全长188公里，流域面积2,910平方公里，平均流量每秒5立方米，发源自拉内默藏附近，河口处在艾吉永附近。

• http://www.geoportail.fr
• The Baïse at the Sandre database
• River Baise guide Places, ports and moorings on the River Baise - french-waterways.com

The Baïse (pronounced: [baiːz]) (Occitan:Baïsa) is a 188-kilometre (117 mi) long river in south-western France, left tributary of the Garonne. Its source is in the foothills of the Pyrenees, near Lannemezan. It flows north through the following départements and towns: