Promontorio di Piombino, Coastal promontory in Livorno Province, Italy.

Promontorio di Piombino is a headland in Livorno Province that juts into the sea with steep rocky cliffs and multiple peaks. The landscape includes several beaches connected by walking paths and bordered by Mediterranean vegetation.

The promontory was originally an island of the Tuscan Archipelago. Over time, sediment carried by the nearby Cornia river, whose mouth once lay closer to Piombino, filled the water separating it from the mainland, joining it to the coast as happened with Monte Argentario. In the Middle Ages Populonia grew on the northern summit beside the Etruscan necropolises.

Populonia, on the northern summit, grew in the Middle Ages beside Etruscan necropolises, and its name recalls the Etruscan city of Pupluna. The beaches at Cala Moresca and Baratti are used today for bathing, while the headland's slopes are a protected Site of Community Importance for their flora and fauna.

Walking trails are clearly marked and accessible throughout the year, though coastal conditions vary between seasons. Sturdy footwear is recommended when exploring rocky areas, and it is helpful to check tide times before visiting the beaches.

The line joining the Piombino and Ancona headlands marks the widest stretch of the Apennines and of the Italian peninsula: 254 km. Off Punta Falcone lie the Insule Falconis, small islets already recorded in the 12th-century Liber de existencia rivierarum. The headland is also listed as a Site of Community Importance for its flora and fauna.