Rotterdam Ahoy is a multi-purpose complex with a convention centre and an indoor arena located in Rotterdam, Netherlands. Opened originally in 1950, the current complex consists of three main venues: a fairs and events hall, a congress and conference centre, and the main venue the Ahoy Arena. The latter opened on 15 January 1971 and is the largest multi-purpose venue in the Netherlands, with a capacity of 16,426 as of May 2019.

Rotterdam is the second-largest city in the Netherlands after the national capital of Amsterdam. It is in the province of South Holland, part of the North Sea mouth of the Rhine–Meuse–Scheldt delta, via the "New Meuse" inland shipping channel, dug to connect to the Meuse at first and now to the Rhine.