南雪平（瑞典语：Söderköping）位于瑞典南部东约特兰省，是南雪平市的治所。

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.