Hillerød Municipality (Danish: Hillerød Kommune) is a municipality (Danish, kommune) in the Capital Region of Denmark.

The mayor of the municipality as of 1 January 2018 is Kirsten Jensen, a member of the Social Democratic political party.

The city of Hillerød also houses the administrative capital of Region Hovedstaden.

At the same time, it became part of the capital of Region Hovedstaden, a new region that includes the Danish capital of Copenhagen, about 25 km to the southeast.

Arresø, the largest lake in Denmark, lies partly in the municipality.