Castagneto Carducci borders the following municipalities: Bibbona, Monteverdi Marittimo, San Vincenzo, Sassetta, Suvereto.

In 1900, the specification Marittimo ('on the sea') was added, which in 1907 was changed to the present one, in honour of the famous poet Giosuè Carducci who, as a child, lived there for some years (near Bolgheri, in the north of the village).

Castagneto Carducci's economy is linked to agriculture and seaside and wine and food tourism, which, especially in summer, benefits from the area's numerous accommodation facilities, which have been awarded the prestigious "Bandiera Blue" cognition.

The Literary Park is characterised by various interesting itineraries that retrace places and landscapes of the Castagneto area present in Carducci's works and life.

Of note is also the former family's adjacent chapel or small church, built 1922-1923 to designs of the architect Luigi Caldini.