Tomišići is located in the municipality Žminj, in Istra County at an elevation of 310 meters above sea level and it covers the area of 2.68 km² (1.03 sq. miles). According to the 2011 census report, there were 135 inhabitants. It is predominantly populated by Croats (99%), but also. Nearby places: Mužini, Vadediji, Modrušani, Bašići, Gradišće, Kresini, Šivati, Karlovići, Krničari and Žminj.