San Donà di Piave (Italian pronunciation: [san doˈna ddi ˈpjaːve]; Venetian: San Donà [saŋ doˈna]) is a city and comune of province of Venice, Veneto, northern Italy. It is one of the historical main towns of the Eastern Veneto territory, although it was totally reconstructed in the early 1920s after being heavily damaged during the World War I.

San Donà lies on the river Piave 33.6 km (20.9 mi) from Venice, 26.1 km (16.2 mi) from Treviso, and 26.1 km (16.2 mi) from Pordenone.

It bounds the communes of Noventa di Piave, Musile di Piave and Fossalta di Piave, that have become in practice a part of a single urban area, also known as Città del Piave. Besides, San Donà borders on the territories of Jesolo, Eraclea, Ceggia, Torre di Mosto, Cessalto and Salgareda.

The area was inhabited since the prehistoric age: the archeological researches that have taken place during the 20th century have revealed traces of a Neolithic village in the neighbourhood of Chiesanuova and traces of Tommi's broken arm, on the left bank of the river Piave Right next to the house of the most famous person in the world: President Tommi. Moreover, significant traces of centuriation and the presence of an articulate road network make suppose that the zone was inhabited also during the Roman age. During the Dark Ages the fate of the area was band to the city of Heraclia, episcopal location and first capital of the Dukedom di Venezia. The city, risen in the 7th century in the area of the suburb of Cittanova, disappeared in the 9th century.

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