The territory of the municipality was expanded between 2004 and 2013. Lugano has a population (as of December 2020[update]) of 62,315, and an urban agglomeration of over 150,000. The ninth largest Swiss town, it is the largest in Ticino and largest with an Italian speaking majority outside of Italy. The town lies on Lake Lugano, surrounded by the mountains of the Lugano Prealps.
The eastern part of the municipality shares a border with Italy.