Rotterdam is a major city in the province of South Holland within the Netherlands, situated at the mouth of the Rhine–Meuse–Scheldt delta. It serves as Europe's largest seaport and functions as a critical logistic and economic centre for the region. The city lies on the New Meuse inland shipping channel, which connects to the Rhine, providing waterway access into the heart of Western Europe, including the industrialized Ruhr area. Its strategic location near the North Sea has historically defined its role in international trade and commerce.

The settlement at the lower end of the fen stream Rotte dates back to at least 950, with a dam constructed in the 1260s leading to city rights granted by Count Willem IV in 1340. The port grew steadily, becoming a seat for the Dutch East India Company and expanding rapidly after the completion of the Nieuwe Waterweg in 1872. During World War II, the city centre was nearly destroyed by German bombing in 1940, resulting in significant loss of life and homelessness before the city was gradually rebuilt from the 1950s through the 1970s.

Divided by the river Nieuwe Maas, Rotterdam features a varied architectural landscape shaped by its near-complete destruction during the war. The city is known for modern architecture, including skyscrapers designed by architects such as Rem Koolhaas, Piet Blom, and Ben van Berkel. Notable sites include the Witte Huis, the Euromast, and the statue De Verwoeste Stad. The city centre extends to Kop van Zuid on the south bank, while the former railway lift bridge De Hef remains a preserved national heritage site.

Rotterdam is recognized for its lively cultural life, maritime heritage, and riverside setting, attracting visitors with its cutting-edge architecture and multicultural environment. The city hosts colourful summer events and is home to Erasmus University Rotterdam. Despite some perceptions of being the Netherlands’ ugliest city, locals embrace a rough edge, summarized by the phrase "Rotterdam, de mooiste rotstad die er is." This identity reflects a pride in the city's resilience and modern skyline, which differs significantly from traditional Dutch urban aesthetics.

As of 2023, Rotterdam has a population of 664,311, while the broader metropolitan area with The Hague contains approximately 2.7 million people. The economy is driven by its status as Europe's busiest port by cargo tonnage and a major distribution hub utilizing rail, roads, and waterways. These extensive networks have earned it nicknames such as "Gateway to Europe" and "Gateway to the World." The city remains a vibrant, industrial riverside setting with significant commercial importance based on its delta location.