Ventotene, in Roman times known as Pandataria or Pandateria from the Greek Pandoteira, is one of the Pontine Islands in the Tyrrhenian Sea, 25 nautical miles (46 km) off the coast of Gaeta right at the border between Lazio and Campania, Italy. The municipality of Ventotene, of the province of Latina (Lazio) has 708 permanent residents as of 2008.
The island, the remains of an ancient volcano, is elongated, with a length of 3 kilometres and a maximum width of about 800 metres.
The municipality includes the small ancillary island of Santo Stefano, located 2 kilometres to the east, which is the site of a massive prison, now closed. A further island, Ponza, is 40 kilometres to the west.
The island is connected by ferry and hydrofoil service to Formia and Anzio; this is supplemented by summer services from and to Ischia