Copenhagen Municipality, also known in English as the Municipality of Copenhagen, located in the Capital Region of Denmark, is the largest of the four municipalities that constitute the City of Copenhagen, the other three being Dragør, Frederiksberg, and Tårnby. The Municipality of Copenhagen constitutes the historical city centre and the majority of its landmarks. It is the most populous in the country with a population of 656,787 inhabitants, and covers 86.4 square kilometres (33.4 sq mi) in area,. Copenhagen Municipality is located at the Zealand and Amager islands and totally surrounds Frederiksberg Municipality on all sides. The strait of Øresund lies to the east. The city of Copenhagen has grown far beyond the municipal boundaries from 1901, when Frederiksberg Municipality was made an enclave within Copenhagen Municipality. Frederiksberg has the largest population density of the municipalities of Denmark.

Frederiksberg Kommune is a municipality on the island of Zealand (Sjælland) in Denmark. Part of the Capital Region of Denmark and the city of Copenhagen, it is surrounded by Copenhagen Municipality. The municipality, co-extensive with its seat, covers a total area of 8.71 km2 according to the Municipal Key Figures and has a population of 104,664 making it the smallest municipality in Denmark area-wise, the seventh most populous, and the most densely populated. Its mayor is Michael Vindfeldt from the Social Democrats serving from 1 January 2022.