Line 6 is one of the sixteen lines of the Paris Métro rapid transit system. Following a semi-circular route around the southern half of the city above boulevards built along the path of the former Fermiers généraux wall of 1784–1860, it runs between Charles de Gaulle–Étoile in the west and Nation in the east. A significant part of the route is on elevated tracks.

The Paris Métro, operated by the Régie autonome des transports parisiens (RATP), is a rapid transit system in the Paris metropolitan area, France. A symbol of the city, it is known for its density within the capital's territorial limits, uniform architecture and unique historical entrances influenced by Art Nouveau. The system is 226.9 kilometres (141.0 mi) long, mostly underground. It has 308 stations of which 64 have transfers between lines. There are 16 lines, numbered 1 to 14, with two lines, Line 3bis and Line 7bis, named because they used to be part of Line 3 and Line 7, respectively. Line 1, Line 4 and Line 14 are automated. Lines are identified on maps by number and colour, with the direction of travel indicated by the terminus.