克泽尔河（土耳其语：Kızılırmak），又译为“克孜勒河”，古希腊语称哈里斯河（Halys River），意为“红河”，土耳其最长河流，发源于东安纳托利亚高原，初向西流，后折往北，最终注入黑海，全长1350公里。

The Kızılırmak (Turkish for "Red River"), also known as the Halys River (Ancient Greek: Ἅλυς), is the longest river entirely within Turkey. It is a source of hydroelectric power and is not used for navigation.