科斯托拉茨是塞尔维亚的城镇，由布兰尼切夫州负责管辖，位于该国东北部多瑙河畔，海拔高度69米，镇上有两座火力发电厂，2011年人口9,264。

Kostolac (Serbian Cyrillic:Костолац; Romanian:Caştelu) is a small Serbian town and municipality on the Danube river in the Braničevo District. The remains of the Roman capital of the province of Moesia Superior Viminacium are located near Stari Kostolac some 2 km to the east of Kostolac. Kostolac town is center of the municipality of Kostolac, which is one of the two municipalities of the City of Požarevac. Kostolac is also a center of area called Stig and home of thermo-power plants and coal mines.