There are two stories related to the origin of the name. One is that found in the official books and documents where Postira has been mentioned in the far 1347 under the name Postirna (from lat. pastura = pasture), whilst the second one, appealed to oral tradition, associate that place with women from the neighbouring village Dol who came to Postira to wash and spread out (prostirati in local dialect) their laundry.