Hoorn is a municipality and a town in the Netherlands, in the province of North Holland. It is located on the Markermeer, 35 kilometres north of Amsterdam, and acquired city rights in 1357. Hoorn had a population of 72,707 in 2017. The area of the municipality is 53.25 km² of which 33.00 km² consists of water, mainly the Markermeer. The municipality consists of the following villages and/or districts: Blokker, Hoorn, Zwaag, and parts of Bangert and De Hulk.
Cape Horn, the most southerly point of the Americas, was named after the town by Willem Schouten, who circled it in 1616. The Hoorn Islands of the French overseas collectivity of Wallis and Futuna in Oceania are also named after this city.