Söderby is a village in Kronoby Municipality, in the region of Ostrobothnia, Finland. Söderby lies at 22 m above sea level. The nearest city is Jyväskylän maalaiskunta, 204 km to the southeast. Among the landmarks around are Nedervetil Church (7.8 km), Jakobstad Church (23 km) and Kronoby Church (8.2 km).