Brašina is located in the municipality Župa Dubrovačka, in Dubrovnik-Neretva County at an elevation of 15 meters above sea level and it covers the area of 1.26 km² (0.49 sq. miles). According to the 2011 census report, there were 767 inhabitants. It is predominantly populated by Croats (94%), but also Bosniaks (3%). Nearby places: Srebreno, Petrača, Kupari, Mlini, Mandaljena, Zavrelje, Čibača, Buići, Čelopeci and Soline.