The Lašva Valley (Serbo-Croatian: Lašvanska dolina, Лашванска долина) is a 17 kilometers long valley in central Bosnia, defined geographically by the Lašva River's route. It is a tributary of the Bosna River. The Lašva River basin covers the territory of four municipalities: Travnik, Novi Travnik, Vitez and Busovača.