Bolsena Lacus is one of a number of hydrocarbon lakes found on Saturn's largest moon, Titan.

[1][2] Bolsena Lacus is located near the north pole of Titan, centered on latitude 75.75°N and longitude 10.28°W, and measures 101 km in length.

[2][note 1] It is situated in a north polar region where the majority of Titan's large lakes are found.

The lake is composed of liquid methane and ethane,[3] and was detected by the Cassini space probe.

It was named in 2007 after Lake Bolsena in Italy.