Allerød Kommune is a municipality (Danish, kommune) on the island of Zealand (Sjælland) in eastern Denmark. The municipality covers an area of 67 km², and has a population of 24,201 (1 April 2014). Its mayor is Jørgen Johansen, a member of the Conservative People's Party (Det Konservative Folkeparti) political party.

The main town, Lillerød (often referred to as 'Allerød'), is also the site of the municipal council. Smaller towns inside the municipality are Blovstrød and the towns of Lynge and Uggeløse, which have grown together

Allerød municipality was not merged with other municipalities by 1 January 2007 as the result of nationwide Kommunalreformen ("The Municipality Reform" of 2007).

The warm period after the last ice age (Wisconsin glaciation) is named the Allerød Oscillation after an archaeological site found at Allerød.

In 1797 six Bronze Age lurs was found in Lynge at Brudevælte.

Allerød is part of the Green Cities concept

The zip/postal code for Lillerød is 3450.

Allerød has a large concentration of technology companies in its industrial zones at the outskirts of the town. These include the hearing aid company Widex, Welltech, a developer of robotic technology for the off-shore industry and Weibel Scientific, a designer and manufacturer of continuous wave doppler radars. Hewlett-Packard's Danish headquarters moved to Allerød in .IBM has a large facility in Blovstrød, just outside Allerød, Widex in Vassingerød.

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