The Nantes tramway is a tramway system operating in the city of Nantes in Pays de la Loire, France. The first tramway in Nantes opened in 1879 and closed in 1958 due to bombing damage during World War II, while the present tramway was re-introduced to the city in 1985.

Semitan is the company responsible for the comprehensive public transport network of Nantes Métropole, the urban community of the French city of Nantes. The network operated by Semitan is marketed under the name and logo TAN and this abbreviated form is also sometimes used to refer to the company. Semitan is itself an acronym for the Société d'Economie Mixte des Transports de l'Agglomération Nantaise. The TAN network comprises three Tramway lines, two Busway lines, an extensive network of buses, an airport shuttle bus line, two Navibus lines and a night bus network. A single common fare system covers all these modes and also extends to suburban trains within the Métropole boundaries, although these trains are not operated by Semitan.