Bača pri Modreju (pronounced [ˈbaːtʃa pɾi mɔˈdɾɛːju] or [-ˈdɾeːju]; in older sources also Bača pri Modreji[2]) is a village in the Municipality of Tolmin in the Littoral region of Slovenia.

The name Bača pri Modreju literally means 'Bača near Modrej', distinguishing the village from the settlement of Bača pri Podbrdu (literally, 'Bača near Podbrdo') in the same municipality.

In 1888 the archaeologists Carlo de Marchesetti and Josef Szombathy discovered 23 urn graves with objects from the Hallstatt culture in Bača pri Modreju.

During the Middle Ages, the counts of Tolmin had a toll house in the village.

After Italy assumed control of the area, the Italians added the inscription "Venne il di nostro – ottobre 1918" (Our day arrived: October 1918).