The Copenhagen Metro (Danish: Københavns Metro [kʰøpm̩ˈhɑwˀns ˈme̝ːtsʰʁo]) is a light rapid transit system in Copenhagen, Denmark, serving the municipalities of Copenhagen, Frederiksberg, and Tårnby.
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.