Tuštevac is located in the municipality Slivno, in Dubrovnik-Neretva County at an elevation of one meter above sea level and it covers the area of 4.56 km² (1.76 sq. miles). According to the 2011 census report, there were 61 inhabitants. It is entirely populated by Croats. Nearby places: Lučina, Mihalj, Duba, Otok, Lovorje, Raba, Kremena, Pižinovac, Trn and Vlaka.