Trnovac Glinski is located in the City of Glina, in Sisak-Moslavina County at an elevation of 272 meters above sea level and it covers the area of 21.80 km² (8.42 sq. miles). According to the 2011 census report, there were 33 inhabitants. It is predominantly populated by Serbs (97%), but also. Nearby places: Kozaperovica, Brestik, Dragotina, Mali Gradac, Momčilovića Kosa, Donji Klasnić, Bijele Vode, Dabrina, Ljeskovac and Gornji Klasnić.