The Danube–Black Sea Canal () is a navigable canal in Romania, which runs from Cernavodă on the Danube river, via two branches, to Constanța and Năvodari on the Black Sea. Administrated from Agigea, it is an important part of the waterway link between the North Sea and the Black Sea via the Rhine–Main–Danube Canal. The main branch of the canal, with a length of , which connects the Port of Cernavodă with the Port of Constanța, was built in 1976–1984, while the northern branch, known as the Poarta Albă–Midia Năvodari Canal, with a length of , connecting Poarta Albă and the Port of Midia, was built between 1983 and 1987.