Olesko

Olesko Ukrainian: Олесько
Symbol of Olesko. 1 Sas, 2 Topór, 3 Herburt, 4 Korczak. Coat of arms of Jan Daniłowicz h. Sas (landowner in 1605), from his mother Katarzyna Tarło/wa h. Topór, and his grandmothers Katarzyna Odnowski/a h. Herburt, and Regina Malczycki/a h. Korczak.
Olesko Location of Olesko within Ukraine
Coordinates: 49°57′47″N 24°53′38″E / 49.96306°N 24.89389°E / 49.96306; 24.89389Coordinates: 49°57′47″N 24°53′38″E / 49.96306°N 24.89389°E / 49.96306; 24.89389
Country	Ukraine
Oblast	Lviv Oblast

Oles'ko (Ukrainian: Олесько; Polish: Olesko; Yiddish: אלעסק Alesk‎) is an urban-type settlement in Busk Raion, Lviv Oblast (region) of western Ukraine. Population: 1,472 (2013 est.).

It was the seat of the rebbes of Alesk, and also the birthplace of Jan III Sobieski, the King of Poland and Grand Duke of Lithuania.

The earliest mentioned Jewish community is in 1500. Oles'ko was the place of residence of tzadikim in the 19th century. In 1935 its Jewish population was 738.