Söderby is a village in Raseborg Municipality, in the region of Uusimaa, Finland. Söderby lies at 14 m above sea level. The nearest city is Kirkkonummi, 52 km to the east. Beaches nearby: Langasbölenranta (2.7 km), Knipnäs (5.2 km), Ormnäs camping's swimming beach (6.5 km). Among the landmarks around are Raseborg Castle (5.8 km), Pojo Church (14.9 km) and Grabbacka (12.5 km).