Frederiksberg Kommune is a municipality (Danish, kommune) on the island of Zealand (Sjælland) in Denmark. It is surrounded by the city of Copenhagen. The municipality, co-extensive with its seat, covers a total area (land and water) of 8.71 km2 (3.36 square miles; 871 hectares) according to the Municipal Key Figures (De Kommunale Nøgletal;www.noegletal.dk) and has a population of 103,192 (1 January 2015) making it the smallest municipality in Denmark area-wise, the fifth most populous, and the most densely populated. Its mayor is Jørgen Glenthøj from the Conservative People's Party (Det Konservative Folkeparti).
The city of Frederiksberg is the only town in the municipality, and is therefore the site of its municipal council.
Frederiksberg is located as an enclave within the municipality of Copenhagen, the national capital. The municipality was originally situated west of Copenhagen, but after a number of smaller municipalities were merged with Copenhagen in 1901, it became completely surrounded by Copenhagen.
Frederiksberg was one of the three last Danish municipalities not belonging to a County—the others being Copenhagen and Bornholm. On 1 January 2007, the municipality lost its county privileges and became part of Region Hovedstaden (i.e. the Copenhagen Capital Region).