Until 1 January 2007, Helsinge was a municipality (Danish, kommune) in Frederiksborg County on the north coast of the island of Zealand (Sjælland) in eastern Denmark. It had a total population of 19,473 (2005), but in the summer months the population grew to over 36.000 people. Its last mayor was Claus Lange, a member of the Venstre (Liberal Party) political party. The main town and the site of its municipal council was the town of Helsinge.
The municipality was created in 1970 due to a kommunalreform ("Municipality Reform") that combined the former municipalities Helsinge/Valby/Mårum, Vejby/Tibirke, Ramløse/Annisse.
Helsinge municipality ceased to exist as the result of Kommunalreformen ("The Municipality Reform" of 2007). It was combined with Græsted-Gilleleje municipality to form the new Gribskov municipality. This created a municipality with an area of 278 km² and a total population of 40,409 (2005). The new municipality belongs to Region Hovedstaden ("Capital Region").
- Christiern Pedersen (c.1480 – 1554 in Helsinge) a Danish canon, humanist scholar, writer, printer and publisher
- Frederik Draiby (1877 in Kirke Helsinge - 1966) a Danish architect and the first city engineer of Aarhus
- Bente Hammer (born 1950 in Helsinge) a Danish textile artist and fashion designer, moved to Bornholm in 1987
- Yuko Takada Keller (born 1958) an artist, curator and essayist based in Helsinge since 1997
- Christian Brøns (born 1977 in Kagerup, Helsinge) a Danish singer
- Rolf Sørensen (born 1965 in Helsinge) a former Danish professional road bicycle racer, with 53 victories over 17 seasons. Now a cycling commentator and agent
- Poul-Erik Høyer Larsen (born 1965 in Helsinge) a retired Danish badminton player and President of the Badminton World Federation
- Morten Petersen (born 1978 in Helsinge) a Danish retired footballer, over 200 caps for Lyngby Boldklub
- Nikolaj Markussen (born 1988 in Helsinge) a Danish handballer who plays for Bjerringbro-Silkeborg
- Jannich Storch (born 1993 in Helsinge) a Danish footballer who plays as a goalkeeper for FC Roskilde
- Municipal statistics: NetBorger Kommunefakta, delivered from KMD aka Kommunedata (Municipal Data)
- Municipal mergers and neighbors: Eniro new municipalities map