Mučići is located in the municipality Matulji, in Primorje-Gorski Kotar County at an elevation of 257 meters above sea level and it covers the area of 3.39 km² (1.31 sq. miles). According to the 2011 census report, there were 356 inhabitants. It is predominantly populated by Croats (95%), but also Slovenes (2%). Nearby places: Permani, Brešca, Jurdani, Ružići, Mali Brgud, Zaluki, Kučeli, Jušići, Zvoneće and Trinajstići.