Ronco sopra Ascona is a municipality near Locarno in the canton of Ticino in Switzerland.

Ronco sopra Ascona is first mentioned in 1264 as Roncha. In 1498 it was mentioned as Ronca de Scona. Ronco sopra Ascona and Ascona a Vicinanza by 1321. The vicinanza had its own statutes by 1369, and broke up in 1641. In the early modern period it was part of the Bailiwick of Locarno.