Nykøbing, often referred to as Nykøbing Sjælland or Nykøbing Sj to distinguish it from Nykøbing F and Nykøbing M, is a seaside town in Denmark, located in Odsherred on the northwestern part of Zealand. Located on the Isefjord, it has a population of 5,049. It is located in Odsherred municipality which is part of Region Sjælland. The town is a popular seaside resort.

Odsherred Municipality is a kommune in Odsherred, Region Sjælland in Denmark. It covers an area of 355 km² with a total population of 32,977 (2023). Its seat is the town of Højby.