Lyngby-Taarbæk Kommune (the spelling Lyngby-Tårbæk Kommune is occasionally used) is a municipality (Danish, kommune) in Region Hovedstaden near Copenhagen on the east coast of the island of Zealand (Sjælland) in eastern Denmark. The municipality covers an area of 39 km², and has a total population of 51,449 (2008). Its mayor as of 2010 is Søren P. Rasmussen, a member of the Liberal Party (Venstre) political party.
The main town and the site of its municipal council is the town of Kongens Lyngby. Other towns in the municipality are Taarbæk, Virum, Sorgenfri, Lundtofte, Brede, Hjortekær and Rådvad. To the east is the Øresund, which separates the island of Zealand from Sweden.
Lyngby-Taarbæk municipality was not merged with other municipalities by January 1, 2007 as the result of nationwide Kommunalreformen ("The Municipal Reform" of 2007).
The municipality is home to head offices of companies such as COWI, Alectia and Hempel Group.
Coordinates: 55°47′N 12°30′E / 55.783°N 12.500°E