Kolašac is located in the municipality Kistanje, in Šibenik-Knin County at an elevation of 262 meters above sea level and it covers the area of 6.59 km² (2.54 sq. miles). According to the 2011 census report, there were 50 inhabitants. It is predominantly populated by Serbs (95%), but also. Nearby places: Modrino Selo, Nunić, Biovičino Selo, Bjelina, Zečevo, Parčić, Dobropoljci, Kistanje, Ivoševci and Gošić.