Kasuni is located in the municipality Bosiljevo, in Karlovac County at an elevation of 180 meters above sea level and it covers the area of 0.49 km² (0.19 sq. miles). According to the 2011 census report, there were 59 inhabitants. It is predominantly populated by Croats (95%), but also. Nearby places: Bosanci, Pribanjci, Sela Bosiljevska, Jančani, Spahići, Žubrinci, Fratrovci, Milani, Johi and Resnik Bosiljevski.