Petrova Poljana is located in the municipality Vojnić, in Karlovac County at an elevation of 150 meters above sea level and it covers the area of 3.37 km² (1.30 sq. miles). According to the 2011 census report, there were only nine inhabitants left. It is largely populated by Serbs (86%), but also Croats (14%). Nearby places: Dunjak, Mračaj Krstinjski, Klupica, Rajić Brdo, Kestenovac, Lisine, Grobnik, Mala Crkvina, Burić Selo and Lipovac Krstinjski.