Žnjidarići is located in the municipality Oprtalj, in Istra County at an elevation of 420 meters above sea level and it covers the area of 1.98 km² (0.76 sq. miles). According to the 2011 census report, there were 46 inhabitants. It is mostly populated by Croats (70%), but also Italians (27%). Nearby places: Vižintini, Zrenj, Gradinje, Pračana, Mali Mlun, Šorgi, Žonti, Ipši, Sovinjska Brda and Sirotići.