Paris Métro Line 14 (French: Ligne 14 du métro de Paris) is one of the sixteen lines on the Paris Métro. It connects the stations Mairie de Saint-Ouen and Olympiades on a north-west south-east diagonal via the three major stations of Gare Saint-Lazare, The Châtelet–Les-Halles complex and the Gare de Lyon. The line goes through the centre of Paris, and reaches the communes of Saint-Ouen-sur-Seine and Clichy.

The first Paris Métro line built from scratch since the 1930s, it has been operated completely automatically since its opening in 1998, and the very positive return of that experiment motivated the retrofitting of Line 1 for full automation. Before the start of its commercial service Line 14 was known as project Météor, an acronym of MÉTro Est-Ouest Rapide.

The line has been used as a showcase for the expertise of the RATP (the operator), and Systra and Siemens Transportation Systems (constructors of the rolling stock and automated equipment respectively) when they bid internationally to build metro systems.

A northward extension to Mairie de Saint-Ouen opened in December 2020. The line is being extended further north to Saint-Denis Pleyel and south to Orly Airport, as part of the Grand Paris Express project.