Popova Luka is located in the municipality Janjina, in Dubrovnik-Neretva County at an elevation of 179 meters above sea level and it covers the area of 9.01 km² (3.48 sq. miles). According to the 2011 census report, there were 24 inhabitants. It is entirely populated by Croats. Nearby places: Janjina, Drače, Trstenik, Žuljana, Sreser, Osobjava, Pijavičino, Dubrava, Potomje and Tomislavovac.