Ustica is a small Italian island in the Tyrrhenian Sea. It is about 5 kilometres (3 mi) across and is situated 52 kilometres (32 mi) north of Capo Gallo, Sicily. Roughly 1,300 people live in the comune (municipality) of the same name. There is a regular ferry service from the island to Palermo in Sicily.

The Tyrrhenian Sea is part of the Mediterranean Sea off the western coast of Italy. It is named for the Tyrrhenian people identified with the Etruscans of Italy.