Strmendolac is located in the City of Trilj, in Split-Dalmatia County at an elevation of 341 meters above sea level and it covers the area of 7.32 km² (2.83 sq. miles). According to the 2011 census report, there were 199 inhabitants. It is entirely populated by Croats. Nearby places: Ugljane, Čaporice, Čačvina, Vedrine, Vinine, Trilj, Velić, Gardun, Jabuka and Jabuka.