Primorsko (Bulgarian: Приморско [priˈmɔrsko]) is a town and seaside resort in southeastern Bulgaria, the capital of the municipality of the same name, and part of Burgas Province.

A well-known resort on the Bulgarian Black Sea Coast, it is located 52 km south of Burgas and has a beach strip of about 1 km2.

Medieval amphoras and pottery have been found in the mouth of the Ropotamo, and the ancient waystation and fortress of Gera is thought to have been located on Maslen nos.

During the Ottoman rule of Bulgaria, there existed a pier used to transport Strandzha wood and charcoal to Constantinople and other major cities.

Other Bulgarians from Central Strandzha came and briefly populated these villages but then decided that Kyupriya's pier is a better source of income and soon moved there, despite the danger of malaria which Dyavolsko blato (Devil's Swamp) constituted.