Indre By (English: lit.'Inner City'), also known as Copenhagen Center or K or Downtown Copenhagen, is an administrative district (bydel) in central Copenhagen, the capital of Denmark. It covers an area of 4.65 square kilometres (1.80 sq mi), has a population of 26,223, and a population density of 5,638 per km.
Amager (Danish pronunciation:[ˈɑˌmɑˀ]or, especially among older speakers,[ˈɑˌmɛˀɐ]), located in the Øresund, is Denmark's most densely populated island, with 225,746 inhabitants (January 2025), more than half of which live in the areas included in Greater Copenhagen municipality. The protected natural area of Naturpark Amager (including Kalvebod Fælled) makes up more than one-third of the island's total area of 96 km.
The county encompassing Greater Copenhagen, the Danish capital, Københavns Kommune Copenhagen Municipality, is partly situated on Amager, covering the northern part of the island, which is connected to the much larger island of Zealand (Sjælland) by eight bridges and a metro tunnel. Amager also has a connection across the Øresund to Sweden, the Øresund Bridge. Its western part begins with a tunnel from Amager to a small, artificial Danish island, Peberholm. Copenhagen Airport Kastrup Lufthavn is located on Amager, around 7 km (4 mi) from Copenhagen city centre.
First opened in October 2002, the driverless light metro supplements the larger S-train rapid transit system, and is integrated with local DSB and regional (Øresundståg) trains and municipal Movia buses. The metro operates 4 lines and operates 44 stations, 30 of which are underground. The M1 and M2 lines serve western and eastern Amager (including Copenhagen Airport) respectively, sharing a common line between the city centre and Vanløse. The M3 is a wholly underground circular line connecting Copenhagen Central Station with Vesterbro, Frederiksberg, Nørrebro, Østerbro and Indre By. The most recent line, M4, supplements the M3 line and connects it to Nordhavn and Sydhavn, as well as Valby via Copenhagen South. The fifth line, M5, is currently in the planning stages and will serve Refshaleøen as well as the under-construction Lynetteholmen neighbourhood, with an expected opening date in 2035.
Slotsholmen (English: The Castle Islet) is an island in the harbour of Copenhagen, Denmark, and part of Copenhagen Inner City. The name is taken from the successive castles and palaces located on the island since Bishop Absalon constructed the city's first castle on the island in 1167 at the site where Christiansborg Palace lies today.
Recognised as the centre of the Government of Denmark since the Middle Ages, the island is sometimes referred to as 'the Island of Power' (Magtens Ø), and is lined with central government institutions and ministries; the name Slotsholmen is thus also frequently used as a metonym for overall Danish governmental administration.