Kremena is located in the municipality Slivno, in Dubrovnik-Neretva County at an elevation of 40 meters above sea level and it covers the area of 2.00 km² (0.77 sq. miles). According to the 2011 census report, there were 59 inhabitants. It is predominantly populated by Croats (96%), but also. Nearby places: Raba, Duba, Tuštevac, Lučina, Lovorje, Mihalj, Otok, Pižinovac, Trn and Slivno Ravno.