Tuk Vojni is located in the municipality Mrkopalj, in Primorje-Gorski Kotar County at an elevation of 878 meters above sea level and it covers the area of 25.30 km² (9.77 sq. miles). According to the 2011 census report, there were 29 inhabitants. It is largely populated by Croats (89%), but also Serbs (11%). Nearby places: Tuk Mrkopaljski, Begovo Razdolje, Mrkopalj, Sunger, Stari Laz, Brestova Draga, Zalesina, Šije, Ravna Gora and Šijska Kosa.