Stupa is located in the municipality Dubrovačko Primorje, in Dubrovnik-Neretva County at an elevation of 200 meters above sea level and it covers the area of 8.62 km² (3.33 sq. miles). According to the 2011 census report, there were 70 inhabitants. It is entirely populated by Croats. Nearby places: Ošlje, Topolo, Štedrica, Imotica, Smokovljani, Hodilje, Luka, Mali Ston, Ston and Česvinica.