The Bača (pronounced [ˈbaːtʃa]) is a river in northwestern Slovenia with a length of 22 km (14 mi). It runs from Bača pri Podbrdu to Bača pri Modreju, where it joins the Idrijca River as its last right tributary. It has the pluvio-nival regime and belongs to the Adriatic Sea Basin.
Coordinates: 46°09′N 13°46′E / 46.150°N 13.767°E