Lazio

Lazio is a region of west central Italy, bordered by Tuscany, Umbria, and Marche to the north, Abruzzo and Molise to the east, Campania to the south, and the Tyrrhenian Sea to the west. It is the region of Rome, capital of Italy. Lazio is classified as being in the Centre territorial unit of Italy by the European Union, with a code of ITE.

Lazio contains 4,491 km2 of mountains, 9,291 km2 of hills and 3,424 km2 of plains. The term plains in this context refers to coastal land of mean elevation zero, some a few feet above and some a few feet below sea level. Inland of the coastal plains in the north is a landform termed the hills, or colli, which are intermediate to the mountains. Generally they are subsumed under the name of the Roman Campagna. It does not exist in the south. Inland of the hills or the coastal zone are the mountains.