The province of Benevento is a province in the Campania region of Italy. Its capital is the city of Benevento. The province has an area of 2,07…The province of Benevento is a province in the Campania region of Italy. Its capital is the city of Benevento. The province has an area of 2,071 km², and, as of 2017, a population of 279,127. There are 78 comuni in the province. The biggest municipalities, the only ones over 10,000 inhabitants, are Benevento, Montesarchio, Sant'Agata de' Goti and San Giorgio del Sannio.