Kolanjski Gajac is located in the municipality Kolan, in Zadar County at an elevation of 2 meters above sea level and it covers the area of 2.24 km² (0.86 sq. miles). According to the 2011 census report, there were 24 inhabitants. It is predominantly populated by Croats (96%), but also. Nearby places: Gajac, Caska, Novalja, Vidalići, Kustići, Mandre, Kolan, Zubovići, Stara Novalja and Šimuni.