The Port of Barcelona (Catalan: Port de Barcelona, IPA: [ˈpɔr ðə βərsəˈɫonə]; Spanish: Puerto de Barcelona) has a 2000-year history and great contemporary commercial importance. It is Catalonia's largest port, vying with Tarragona, and Europe's ninth largest container port, with a trade volume of 2.57 million TEU's in 2008. It is also one of the most important ports in the Mediterranean. The port is managed by the Port Authority of Barcelona. Its 7.86 km² (3 sq mi) are divided into three zones: Port Vell (the Old Port), the commercial/industrial port and the logistics port (Barcelona Free Port). The port is undergoing an enlargement that will double its size by diverting the mouth of the Llobregat river 2 km (1¼ mi) to the south, and slightly pushing back the Llobregat Delta Nature Reserve.

This is not the only port in Barcelona, as there are also two additional yacht harbors / marinas: Port Olímpic and Port Fòrum Sant Adrià to the north.