Poljanak is located in the municipality Plitvička Jezera, in Lika-Senj County at an elevation of 586 meters above sea level and it covers the area of 6.64 km² (2.56 sq. miles). According to the 2011 census report, there were 97 inhabitants. It is predominantly populated by Croats (95%), but also Serbs (5%). Nearby places: Korana, Sertić Poljana, Plitvica Selo, Rastovača, Selište Drežničko, Smoljanac, Plitvička Jezera, Čatrnja, Korita and Irinovac.