Korosnytsia (Ukrainian: Коросниця, German: Josephsberg or Josefsberg, Polish: Korośnica or Korosnica) is a village (selo) in Drohobych Raion, Lviv Oblast, in south-west Ukraine.

Joseph II encouraged German farmers, typically from the Palatinate (i.e. Rheinland-Pflaz, a state now in south-west Germany), to relocate to the area, and farm the land.

The settlers were assured complete and comprehensive freedom of conscience and religion as per the "Settlement-Patent" of September 21, 1782.

The 1882 Polish geographic dictionary described the people of Josefsberg: "They are of Helvetic confession, have their own priest, beautiful stone church, evangelical school.

"[2] At the onset of World War II the Germans still living in these villages were resettled back into German-occupied territories.