Pietrasanta is a town and comune on the coast of northern Tuscany in Italy, in the province of Lucca. Pietrasanta is part of Versilia, on the last foothills of the Apuan Alps, about 32 km north of Pisa. The town is located 3 km off the coast (where the frazione of Marina di Pietrasanta is located).

The Pietrasanta Marina, with golden sand and luxurious equipments is considered one of the best beaches of Italy.

The town has Roman origins and part of the Roman wall still exists.

The medieval town was founded in 1255 upon the preexisting "Rocca di Sala" fortress of the Lombards by Luca Guiscardo da Pietrasanta, from whom it got its name. Pietrasanta was at its height a part of the Republic of Genoa (1316–1328). The town is first mentioned in 1331 in records of Genoa, when it became a part of the Lucca along with the river port of Motrone, and was held until 1430. At that time it passed back to Genoa until 1484, when it was annexed to the Medici held seigniory of Florence.

In 1494, Charles VIII of France took control of the town. It remained a Luccan town again until Pope Leo X, a member of the Medici family, gave Pietrasanta back to his family.