Lopača is located in the municipality Jelenje, in Primorje-Gorski Kotar County at an elevation of 280 meters above sea level and it covers the area of 2.42 km² (0.93 sq. miles). According to the 2011 census report, there were 86 inhabitants. It is predominantly populated by Croats (93%), but also. Nearby places: Valići, Drastin, Ilovik, Lukeži, Ratulje, Martinovo Selo, Baštijani, Lubarska, Jelenje, Bašunje Male and Bašunje Vele.