Potirna is a village on the island of Korčula in Croatia. Korčula is part of the Dalmatian coast and it belongs to the Dubrovnik-Neretva County. Potirna is part of the Municipality of Blato. According to the census in 2001, the village had a population of 21. Potirna evolved in the mid-19th century around several fertile fields on the far west end of the island. There are archeological remains of Gradine in Potirna, as well ancient Greek artifacts. The Gradine were built by Illyrians and were stone fortresses. Gradine are found in other parts of the island. Cultivation of grapes, olives and figs are Potirna's main agriculture product base. The village consists of Gornja Potirna and Donja Potirna (Upper and Lower Potirna). The local bays are Grdaca, Žalić, Garma, Nova and Slatina.