Kozalj Vrh is located in the City of Duga Resa, in Karlovac County at an elevation of 180 meters above sea level and it covers the area of 3.83 km² (1.48 sq. miles). According to the 2011 census report, there were 91 inhabitants. It is entirely populated by Croats. Nearby places: Dvorjanci, Dubravčani, Gršćaki, Venac Mrežnički, Dubravci, Grganjica, Belavići, Donji Zvečaj, Frketić Selo and Mračin.