阿姆斯特丹（荷兰语：Amsterdam[ɑmstərˈdɑm]），华人有时也称其为荷京，是荷兰首都及最大城市，位于该国西部省份北荷兰省。根据2008年1月的统计数据，这座城市人口达747,290人；而该城市所处的兰斯台德都市圈，大约有670万人口，是欧洲第6大都市圈。

其名称源于Amstel dam， 这表明了该城市的起源：一个位于阿姆斯特尔河上的水坝，即今水坝广场址。12世纪晚期一个小渔村建于此，而后由于贸易的迅猛发展，阿姆斯特丹在荷兰黄金时代一跃而成为世界上最重要的港口。在那个时代，该城是金融和钻石的中心。 19和20世纪，该城扩展，许多新的街坊与近郊住宅区形成。

Amsterdam (/ˈæmstərdæm, ˌæmstərˈdæm/; Dutch: [ɑmstərˈdɑm]) is the capital and most populous city of the Kingdom of the Netherlands. Its status as the Dutch capital is mandated by the Constitution of the Netherlands though it is not the seat of the Dutch government, which is The Hague. Amsterdam has a population of 838,338 within the city proper, 1,335,115 in the urban area and 1,603,531 in the metropolitan area. The city region has an approximate population of 2,431,000. The city is located in the province of North Holland in the west of the country, and is also North Holland's largest city. It comprises much of the northern part of the Randstad, one of the larger conurbations in Europe, with a population of approximately 7 million.