Nynäshamn Municipality (Nynäshamns kommun) is a municipality in Stockholm County in east central Sweden. Its seat is located in the city of Nynäshamn. In 1974 the former City of Nynäshamn (itself instituted in 1946) was united with Ösmo, from which it had been detached as a market town (köping) in (...) (from Wikipedia)