Ascona is a municipality in the district of Locarno in the canton of Ticino in Switzerland. It is located on the shore of Lake Maggiore. The town is a popular tourist destination, and holds a yearly jazz festival, the Ascona Jazz Festival.

Ascona has an area, as of 1997, of 4.97 square kilometers (1.92 sq mi). Of this area, 1.78 km2 (0.69 sq mi) or 35.8% is used for agricultural purposes, while 1.66 km2 (0.64 sq mi) or 33.4% is forested. Of the rest of the land, 2.63 km2 (1.02 sq mi) or 52.9% is settled (buildings or roads), 0.01 km2 (2.5 acres) or 0.2% is either rivers or lakes and 0.2 km2 (0.077 sq mi) or 4.0% is unproductive land.