Halsnæs Kommune is a municipality (Danish, kommune) in Region Hovedstaden ("Capital Region"). The municipality covers an area of 122.15 km² (2013), according to Municipal Key Figures (De Kommunale Nøgletal (www.noegletal.dk)), and has a total population of 30,644 (1 April 2014). Its name comes from Halsnæs, the peninsula that forms the western part of the municipality. The municipality was created on 1 January 2007 as a merger of the former municipalities of Frederiksværk and Hundested. At first the merged municipality wore the hyphenated name Frederiksværk-Hundested, but it was changed to Halsnæs on 1 January 2008. Its mayor, as of 1 January 2018, is Steffen Jensen, a member of the Social Democrats political party.