Porte Maillot is a station on Paris Métro Line 1 and as Neuilly–Porte Maillot on the RER C and RER E. The station replaces another station of the same name, the original terminus of Line 1, which was demolished and moved in 1936.

Paris Métro Line 1 is one of the sixteen lines of the Paris Métro. It connects La Défense–Grande Arche in the northwest and Château de Vincennes in the southeast. With a length of 16.5 km (10.3 mi), it constitutes an important east–west transportation route within the City of Paris. Excluding RER commuter lines, it is the busiest line on the network with 181.2 million travellers in 2017 or 496,000 people per day on average.