Osina is a village in Southwestern Bulgaria. It is located in the Satovcha Municipality, Blagoevgrad Province. The village of Osina is located in the Western Rhodope Mountains. It belongs to the Chech region. The village was founded some time in the beginning of the 15 century when shepherds from the village of Kochan moved to the place where they had their dairies to avoid getting infected with plague. At a later time the village saw more refugees from the area around Serres but it is not known when and under what circumstances it happened.