 It is located 11 kilometres (6.8 mi) northeast of Milan along the Naviglio Martesana, which gives the town its name.The municipality of Cernusco sul Naviglio has a total area of 13.33 km2 (5 square miles) with a median altitude of 133 metres above sea level.The municipality includes the main urban area of Cernusco and the "frazione" of Ronco at the eastern border of the municipal area, as well as some traditional farmhouses ("cassin" in Lombard) still not contiguous to other urbanized parts of the municipality.