Tomingaj is located in the municipality Gračac, in Zadar County at an elevation of 652 meters above sea level and it covers the area of 15.78 km² (6.09 sq. miles). According to the 2011 census report, there were 19 inhabitants. It is predominantly populated by Serbs (98%), but also. Nearby places: Deringaj, Kijani, Gračac, Štikada, Rudopolje Bruvanjsko, Bruvno, Gubavčevo Polje, Omsica, Grab and Ričice.