Pocerina is an area in the western part of Serbia, occupying lowland and lowland terrain on the northern side of the Cer mountain. It extends to Macva and Posavina. Pocerina was named after Mount Cer, the northernmost island mountain on the southern edge of the Pannonian Basin. Pocerina is located north of the mountain Cer. The area of Pocerina is 315 km². Two rivers flow through Pocerina: Dumača and Dobrava. Pits and sinkholes appear in the limestone parts of Pocerina.