The Naviglio della Martesana is a canal in the Lombardy region, Northern Italy. Running from the Adda river, in the vicinity of Trezzo sull'Adda, to Milan, it was also known as Naviglio Piccolo. It is part of the system of navigli of the Milan area.
Approximately 38 kilometres long, with a substantial section covered over or infilled, its width varies between 9 and 18 metres, while the depth is between one and three metres.
Originally named Naviglio Piccolo, it subsequently changed to Martesana from the name of the county across which it runs.
Address 58 Via Lazzaretto, Gorgonzola 20064, Italy
Coordinates 45°31'36.008" N 9°23'33.123" E