The first documented mention of Bobrowniki comes from 1375, when it was located near the eastern border of Poland. The village was frequently destroyed in the raids of the Lithuanians, Yotvingians, Tatars and Rusyns. This ended in the late 14th century, when, after the Union of Krewo, the raids ended, and in the second half of the 15th century, Stanislaw Tarlo, the owner of Bobrowniki, managed to convince King Kazimierz Jagiellonczyk to grant Magdeburg rights to the village. It happened on July 24, 1485. Bobrowniki remained a small town, whose population reached its maximum in c. 1660, when it was almost 2,000. After that, Bobrowniki declined, and its population was decimated by cholera (1780–85), when 1,600 died.