The Vetluga (Russian: Ветлу́га, IPA: [vʲɪtˈlugə]; Mari: Вӱтла, romanized: Vütla) is a river that flows through Kirov Oblast, Kostroma Oblast, Mari El and Nizhny Novgorod Oblast in Russia. It is a left tributary of the Volga.^[1] Their confluence is near Kozmodemyansk. The river is navigable. It is 889 kilometres (552 mi) long, and has a drainage basin of 39,400 square kilometres (15,200 sq mi).^[1] Its largest tributaries are Neya, Bolshaya Kaksha, Usta and Yuronga from the left and Vokhma and Lyunda from the right.^[1] The town Vetluga is situated on the river and named after it.