Kestenovac is located in the municipality Donji Lapac, in Lika-Senj County at an elevation of 548 meters above sea level and it covers the area of 12.97 km² (5.01 sq. miles). According to the 2011 census report, there were 39 inhabitants. It is entirely populated by Serbs. Nearby places: Donji Štrbci, Gornji Štrbci, Bušević, Mišljenovac, Kruge, Birovača, Nebljusi, Donji Lapac, Dnopolje and Gajine.