Kysylyn (Ukrainian: Кисилин, Polish: Kisielin) is a town in Volyn Oblast, Ukraine.

[1] Before World War II, Kysylyn was located within the Wołyń Voivodeship in the eastern part of the Second Polish Republic.

From the first days of November, 1941 a closed ghetto was established and existed till August 1942 when it was totally liquidated by Germans who were helped by Ukrainian police.

The Polish citizens who assembled for a Sunday service at a local Catholic church, were killed by a machine gun.

The Kisielin massacre was part of the province–wide massacres of Poles in Volhynia and Galicia, with the estimated 35-60 thousands ethnic Poles[4] and thousands Ukrainian-Polish loyalists from Wołyń killed by Ukrainian partisans during World War II.