Area naturale protetta di interesse locale Sterpaia, Protected coastal reserve in Piombino, Italy.

Sterpaia is a protected coastal area in the province of Livorno, inside the gulf between Piombino and Follonica, covering about 296 hectares: 17 hectares of beaches along roughly 10 km of coast, 124 hectares of dunes and 155 hectares of forest and clearings. Its gently crescent-shaped shore of light sand is backed by a narrow dune line, and towers that once watched the coast stand along the contour.

Sterpaia became a protected area of local interest under a 1998 regional measure of Tuscany, the year the sources give for its establishment. It lies in the province of Livorno, on the Tyrrhenian coast inside the gulf between Piombino and Follonica, and forms part of the Sistema dei Parchi della Val di Cornia. The sources record no further events in its history.

The park belongs to the Sistema dei Parchi della Val di Cornia, a network of protected areas in the Val di Cornia. Along the coast, various towers once used to watch over the shoreline mark the park's outline. The access roads to the entrances and beaches branch off the so-called "geodesic" road linking the hamlet of Riotorto to Piombino.

Visitors can explore the different zones on a network of trails spanning roughly 10 kilometers, from pine forests to sand dunes. All paths are marked and connect the main landscape areas throughout the reserve.

The park's coastline is slightly sickle-shaped, with pale sand backed by a narrow dune belt; several towers along the contour once served as coastal watch posts. Access roads to the entrances and beaches branch off the so-called geodetic road linking the hamlet of Riotorto with Piombino.