Nyköping Municipality

Nyköping Municipality (Swedish: Nyköpings kommun) is a municipality in Södermanland County in southeast Sweden. Its seat is located in the city of Nyköping, which is containing a majority of the residents. Its southern tip in the district of Tunaberg is the southernmost point of mainland Svealand, one of the three original crowns forming Sweden. Nyköping is the administrative capital of Södermanland and hosts both the governors' residence and the regional council.

The municipality was created in 1971 with the amalgamation of the City of Nyköping and a great number of other municipalities. It was split up in three parts in 1992, when Gnesta Municipality and Trosa Municipality were created. The rural areas of the modern municipality is a merger between the historical rural districts of Jönåker in the west and Rönö in the east. The northwestern part of the Jönåker hundred was replaced by the southeastern part of Oppunda. The village of Jönåker itself became part of the municipality as a result of the mergers. Politically, Nyköping is historically dominated by the Social Democrats, although margins between the coalitions have been closer in some recent elections. Employment has transformed from industry to more of a commuter and service town in recent decades.