This is a list of islands of Italy. There are nearly 450 islands in Italy, including islands in the Mediterranean Sea (including the marginal seas: Adriatic Sea, Ionian Sea, Libyan Sea, Ligurian Sea, Sea of Sardinia, Tyrrhenian Sea, and inland islands in lakes and rivers. The largest island is Sicily with an area of 25,711 km² (9,927 sq mi). The outlying islands of Italy make up an official region of Insular Italy with an area of 49,801 km² (19,228 sq mi).

Italy has a coastline and border of 7,600 km (4,700 mi) on the Mediterranean Sea. The following sections list the islands by coastal region, major island, lagoon, or archipelago.

41°26′41″N 16°05′05″E / 41.4447°N 16.0847°E / 41.4447; 16.0847 (Faraglioni di Baia dei Mergoli)

41°29′07″N 16°07′12″E / 41.4854°N 16.1201°E / 41.4854; 16.1201 (Isola di Campi)

Islands off the coast of Calabria include:

Islands in the Campanian Archipelago include:

The Cheradi Islands include:

There are nearly 120 islands in the Marano Grado Lagoon of the Adriatic Sea, including: