Pleternica is a town in the region of Slavonia, Croatia, 12 km (7.5 mi) southeast of Požega, in the Požega Valley (Požeška kotlina). The population of the municipality is 9,138, with 2,895 in Pleternica itself (2021).

Pleternica is located at the confluence of the river Londža into the Orljava river, at the foot of the mountain Požeška Gora; elevation 153 m (502 ft).

As of 2011, the municipality consists of 38 settlements:^{[needs update]}

45°17′N 17°48′E / 45.283°N 17.800°E / 45.283; 17.800