The Maggia is a river in the Swiss canton of Ticino.
The springs are near the Cristallina mountain at 8136 ft. The river runs through the Val Sambuco, the Val Lavizzara, and the Valle Maggia, and enters Lago Maggiore between Ascona and Locarno. The village Maggia is situated on the river.
The river is used for hydroelectric power production, e.g. with the dams of Lago del Narèt and Lago del Sambuco near the sources.
