Silea is a comune in the Province of Treviso in the Italian region Veneto, located about 25 kilometres north of Venice and about 4 kilometres e…Silea is a comune in the Province of Treviso in the Italian region Veneto, located about 25 kilometres north of Venice and about 4 kilometres east of Treviso. As of 31 December 2004, it had a population of 9,767 and an area of 18.7 square kilometres.