Colceag is a commune in Prahova County, Muntenia, Romania. It is composed of four villages: Colceag, Inotești, Parepa-Rușani, and Vâlcelele.

The commune is situated in the Wallachian Plain, at an altitude of 103 m (338 ft), on the banks of the river Bălana. It is located in the southeastern extremity of Prahova County, 32 km (20 mi) east of the county seat, Ploiești. The Inotești train station serves the CFR Main Line 500, which starts in Bucharest, goes through Ploiești and Buzău, and continues towards Moldavia.

• Official site of Châtillon-sur-Chalaronne in France, the twin town of Colceag