Sofijanauka is a village in Biržai District Municipality, in Panevėžys County, Lithuania. Sofijanauka lies at 52 m above sea level. The nearest city is Panevėžys, 53 km to the southwest. Among the landmarks around are Biržai Castle (4.9 km), Church of the Assumption of Mary in Skaistkalne (23 km) and Rundāle Palace (49 km). Among the natural features are Cow cave (3.4 km).