Pontelongo is a comune (municipality) in the Province of Padua in the Italian region Veneto, located about southwest of Venice and about southeast of Padua. As of 31 December 2004, it had a population of 3,853 and an area of .
Pontelongo borders the following municipalities: Arzergrande, Bovolenta, Brugine, Candiana, Codevigo, Correzzola, Piove di Sacco.