The Styr (Ukrainian: Стир; Belarusian: Стыр; Russian: Стырь) is right tributary of the Pripyat, with a length of 494 km. Its basin area is 13,100 km2 located in historical region of Volhynia.
The Styr begins near Brody, in the Ukrainian Oblast of Lviv, then flows into the Rivne Oblast, Volyn Oblast, then into the Belarusian voblast of Brest where it finally flows into the Pripyat.
During the Khmelnytskyi Uprising, in 1651 at Styr river took place important battle of Berestechko between armies of Polish-Lithuanian Commonwealth and Cossacks of Khmelnytskyi.
During 1915–1916, the Styr river was the front line between the Austro-Hungarian and Imperial Russian armies.
The river was also a barrier to the German invasion on June 22, 1941 during Operation Barbarossa on the South-Western Front.
Notable settlements located on the river are Lutsk, Staryi Chortoryisk and Varash.
- Left: Radostavka, Sudylivka, Chornohuzka, Lypa, Serna, Liutytsia, Okinka, Richytsia, Zhyduvka, Omelianyk
- Right: Ikva, Slonivka, Pliashivka, Boldurka, Liubka, Rudka, Kormyn, Riv, Konopelka, Sapalayivka
The Styr River on the map of Volyn Oblast
- ^ Izsák Tibor (2007). Ukrajna természeti földrajza (pdf) (in Hungarian). II. Rákóczi Ferenc Kárpátaljai Magyar Főiskola. p. 95. Retrieved 2019-04-20.