The Rotterdam Philharmonic Orchestra is a Dutch symphony orchestra based in Rotterdam. Its primary venue is the concert hall De Doelen. The RPhO is considered one of the Netherlands' two principal orchestras of international standing, second to the Royal Concertgebouw Orchestra of Amsterdam. In addition to symphony concerts, the RPhO performs as the opera orchestra in productions at De Nederlandse Opera, as do other Dutch ensembles.

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.