Blatna Vas is located in the City of Buzet, in Istra County at an elevation of 312 meters above sea level and it covers the area of 3.67 km² (1.42 sq. miles). According to the 2011 census report, there were only six inhabitants left. It is entirely populated by Croats. Nearby places: Kotli, Forčići, Sušići, Rim, Cunj, Brnobići, Čiritež, Roč, Stanica Roč and Benčići.