Castelcucco is a comune (municipality) in the Province of Treviso in the Italian region Veneto, located about 60 kilometres (37 mi) northwest of Venice and about 35 kilometres (22 mi) northwest of Treviso. As of 31 May 2021, it had a population of 2,288 and an area of 8.8 square kilometres (3.4 sq mi).

The province of Treviso is a province in the Veneto region of Italy. Its capital is the city of Treviso. The province is surrounded by Belluno in the north, Vicenza in the west, Padua in southwest, Venice in the south-east and Friuli-Venezia Giulia in the east. The current President of Treviso is Stefano Marcon, elected in September 2016. He is also the current mayor of Castelfranco Veneto.