Chinit River (alternates: Stung Chinit or Stoeng Chinith; Khmer: ស្ទឹងជីនិត) is a river of Cambodia. Located in Kampong Thom Province, it is a major tributary of the Tonlé Sap Lake ("Great Lake"), which joins the Tonlé Sap River at the downstream end in the larger Mekong basin. Somewhat unusually the river is looped back into the same river system, which accounts for its length of 264 kilometres (164 mi), leaving Tonlé Sap lake and entering its river again downstream. The prehistoric archaeological site of Samrong Sen is located on the river bank. Water resource projects, commencing in 1971 and in 2003, have had various measures of success. The river is an important trade route.