Randers Fjord is a 30 km (19 mi) long Danish fjord in Northern Europe leading to the sea of Kattegat, between Denmark and Sweden. The fjord is the outlet from Denmark's longest river, Gudenå. The upper 13 km (8.1 mi), starting at the town Randers, looks more like a broad river than a fjord. The lower 17 km (11 mi) have extensive reed plains bordering the shores To some extent this inhibits the recreational use of and access to the fjord. In some places, the reed beds are harvested for traditional roof thatching. The shallow eastern part of the fjord is known as Grund Fjord, being an extension of Alling Å.

Randers is a city in Randers Municipality, Central Denmark Region on the Jutland peninsula. It is Denmark's sixth-largest city, with a population of 64,057. Randers is the municipality's main town and the site of its municipal council. By road it is 38.5 kilometres (23.9 mi) north of Aarhus, 43.8 kilometres (27.2 mi) east of Viborg, and 224 kilometres (139 mi) northwest of Copenhagen.