Mravnica is located in the City of Šibenik, in Šibenik-Knin County at an elevation of 151 meters above sea level and it covers the area of 3.88 km² (1.50 sq. miles). According to the 2011 census report, there were 78 inhabitants. It is entirely populated by Croats. Nearby places: Perković, Lepenica, Boraja, Podine, Sitno Donje, Slivno, Ljubitovica, Vrsno, Primorski Dolac and Sitno.