Kostrčani is located in the municipality Kršan, in Istra County at an elevation of 20 meters above sea level and it covers the area of 5.63 km² (2.17 sq. miles). According to the 2011 census report, there were 30 inhabitants. It is predominantly populated by Croats (96%), but also. Nearby places: Šušnjevica, Nova Vas, Zatka Čepić, Zankovci, Jesenovik, Lanišće, Purgarija Čepić, Grobnik, Letaj and Polje Čepić.