Montana Province (Bulgarian: Област Монтана, transliterated: Oblast Montana) is a province in northwestern Bulgaria, bordering Serbia in the southwest and Romania in the north. It spreads its area between the Danube river and Balkan mountain. As of February 2011, the province has a population of 148,098 inhabitants, on territory of 3,635.5 km². It was named after its administrative centre the city of Montana.