The Walls of Ston (Croatian: Stonske zidine) are a series of defensive stone walls, originally more than 7 kilometres (4.3 mi) long, that surrounded and protected the city of Ston, in Dalmatia, part of the Republic of Ragusa, in what is now southern Croatia.

[4] Despite being well protected by massive city walls, the Republic of Ragusa used Pelješac to build another line of defence.

[5] Throughout the era of the Republic, the walls were maintained and renovated once they meant to protect the precious salt pans that contributed to Dubrovnik's wealth, which are still being worked today.

The wall around Mali Ston was demolished with the excuse that it was damaging the health of the people.

Noted artist who work on the walls project are Michelozzo, Bernardino Gatti of Parma and Giorgio da Sebenico (Juraj Dalmatinac).