Copenhagen is the capital and most populous city of Denmark, with a population of 1.4 million in the urban area. The city is situated on the …Copenhagen is the capital and most populous city of Denmark, with a population of 1.4 million in the urban area. The city is situated on the islands of Zealand and Amager, separated from Malmö, Sweden, by the Øresund strait. The Øresund Bridge connects the two cities by rail and road.