Ustrine is located in the City of Mali Lošinj, in Primorje-Gorski Kotar County at an elevation of 135 meters above sea level and it covers the area of 17.66 km² (6.82 sq. miles). According to the 2011 census report, there were 23 inhabitants. It is predominantly populated by Croats (95%), but also. Nearby places: Belej, Stivan, Osor, Miholašćica, Grmov, Martinšćica, Nerezine, Vrana, Stanić and Vidovići.