Söderby is a village in Östhammar Municipality, in Uppsala County, Sweden. Söderby lies at 13 m above sea level. The nearest city is Upplandstuna, 35 km to the southwest. Beaches nearby: Krutudden (4.2 km), Tallparksbadet (4.7 km). Among the landmarks around are Valö Church (14.7 km), Harg Church (12.6 km) and Djursten (7.7 km).