Lugano ( loo-GAH-noh, UK also luu-GAN-oh, Italian: [luˈɡaːno]; Ticinese: Lugan [lyˈɡãː]) is a city and municipality within the Lugano District in the canton of Ticino, Switzerland. It is the largest city in both Ticino and the Italian-speaking region of southern Switzerland. Lugano has a population (as of December 2020) of 62,315, and an urban agglomeration of over 150,000. It is the ninth largest Swiss city.

The city lies on Lake Lugano, at its largest width, and, together with the adjacent town of Paradiso, occupies the entire bay of Lugano. The territory of the municipality encompasses a much larger region on both sides of the lake, with numerous isolated villages.