Castagnola-Cassarate is a quarter of the city of Lugano, in the Swiss canton of Ticino. Until 1972, it was an independent municipality under the name Castagnola. Castagnola-Cassarate includes the waterfront on the north side of Lake Lugano from the outfall of the Cassarate River in the west, continuing under Monte Brè to a border with Gandria in the east. It also includes waterfront areas on the opposite, southern, side of Lake Lugano, reaching up to the border with Italy at the summit of Sighignola. The villages and settlements of Caprino, Cassarate, Castagnola, , and are all included. It has an area of 297 hectares (730 acres) and, in 2011, it had a population of 6,167.