Donji Štrbci is located in the municipality Donji Lapac, in Lika-Senj County at an elevation of 541 meters above sea level and it covers the area of 5.99 km² (2.31 sq. miles). According to the 2011 census report, there were only 14 inhabitants. It is largely populated by Serbs (81%), but also Croats (19%). Nearby places: Kestenovac, Gornji Štrbci, Nebljusi, Kruge, Bušević, Birovača, Mišljenovac, Dnopolje, Donji Lapac and Gajine.