Piombino is an Italian town and comune of about 35,000 inhabitants in the province of Livorno (Tuscany). It lies on the border between the Ligurian Sea and the Tyrrhenian Sea, in front of Elba Island and at the northern side of Maremma.

The province of Livorno or, traditionally, province of Leghorn, is a province in the Tuscany region of Italy. It includes several islands of the Tuscan Archipelago, including Elba and Capraia. Its capital is the city of Livorno. When formed in 1861, the province included only Livorno and Elba Island. It was extended in 1925 with land from the provinces of Pisa and Genoa. It has an area of 1,211 square kilometres (468 sq mi) and a total population of 343,003 (2012). The province contains 19 comuni. The coastline of the area is known as "Costa degli Etruschi".