Lisac is located in the municipality Dubrovačko Primorje, in Dubrovnik-Neretva County at an elevation of 225 meters above sea level and it covers the area of 7.12 km² (2.75 sq. miles). According to the 2011 census report, there were 37 inhabitants. It is entirely populated by Croats. Nearby places: Zamaslina, Podimoć, Visočani, Čepikuće, Podgora, Točionik, Smokovljani, Doli, Zaton Doli and Mravnica.