Ramunderberget

Söderköping is a locality and the seat of Söderköping Municipality, Östergötland County, Sweden with 6,992 inhabitants in 2010. Söderköping is, despite its small population, for historical reasons normally still referred to as a city. Statistics Sweden, however, only counts localities with more than 10,000 inhabitants as cities.

Söderköping Municipality (Söderköpings kommun) is a municipality in Östergötland County in southeast Sweden. Its seat is located in the city of Söderköping.The present municipality was created in 1971-1973 when the former City of Söderköping in two steps was amalgamated with three surrounding rural municipalities.

Söderköpingsån is a river in Sweden.