Duba Stonska is located in the municipality Ston, in Dubrovnik-Neretva County at an elevation of 5 meters above sea level and it covers the area of 6.36 km² (2.46 sq. miles). According to the 2011 census report, there were 33 inhabitants. It is entirely populated by Croats. Nearby places: Boljenovići, Sparagovići, Luka, Česvinica, Metohija, Štedrica, Zabrđe, Hodilje, Imotica and Mali Ston.