The RATP bus network covers the entire territory of the city of Paris and the vast majority of its near suburbs. Operated by the Régie Autonome des Transports Parisiens (RATP), this constitutes a dense bus network complementary to other public transport networks, all organized and financed by Île-de-France Mobilités.

Other suburban bus lines are managed by private operators grouped in a consortium known as Optile (), an association of 80 private bus operators holding exclusive rights on their lines. There are approximately 9500 buses serving public transportation across the Paris region, all operators included.

Network

RATP operates:

70 lines with a route exclusively or mainly on the territory of the city of Paris including: 64 lines numbered from to the line completing (with ) a circular transport service surrounding Paris's borders along the Boulevards des Maréchaux 4 out of the 5 specially identified parisian circular bus lines designated as "Lignes Traverse": , , and 194 lines with a route exclusively or mainly in the near suburbs of Paris including: 89 lines numbered from to 57 lines numbered from to 49 lines numbered from to a dozen lines (numbered in the 400 series) subcontracted by local public transport companies belonging to the Optile group several "urban" line services numbered in the 500 series but generally designated by a trade name, covering small suburban shuttle services and often subsidized by covered cities the "Tootbus" tourist lines the lines of the "Titus" and "Valouette" networks several temporary lines created to cover passenger shifts along a future subway or tram line extension (such as line before northern extension of towards the town hall of Aubervilliers or now-former line before northern extension of from Saint Lazare train station to the town hall of Saint Ouen several lines kept in service to cover passenger shifts prior to subway or tram line extensions or creations (such as line before southern extension of from Orly Airport to Juvisy train station, or before extension of towards said airport) Some routes only run during rushing hours (ex. ) or during school days ( only) 32 night shift lines (including two subcontracted) grouped in the Noctilien night bus network

Routes

RATP bus lines operating mainly in the city proper of Paris, are named with a two-digit code number called "indice". Bus lines operated mainly in the suburbs are named with a three-digit number code.

RATP uses the numbers 20 to 96 for lines operated mainly in the city proper (1 to 19 are unused to avoid confusion with Metro lines); along with bus line (line 100) which runs along the Boulevard des Maréchaux section that is not yet covered by (Tramway lines 3a & 3b) . All this according to an organized scheme used since public transportation reorganization post-WWII.

The first digit represents the sector in Paris where the line's starting point is located: 2x representing Gare Saint-Lazare 3x representing Gare de l'Est 4x representing Gare du Nord 5x representing Opéra and overall Rive Droite 6x representing Austerlitz or Gare de Lyon train stations 7x represents Châtelet and overall Center of Paris (along Rivoli Street) 8x represents Quartier Latin and overall Rive Gauche 9x represents Gare Montparnasse.

The digit number represents the outermost arrondissement the line finishes (or crosses Paris' borders) in:

x2 represents the 16th arrondissement (from Pont du Garigliano to Porte Maillot) x3 and x4 represent the 17th arrondissement (from Porte Maillot to Porte d'Asnières for lines ending in 3, from Porte de Clichy to Porte des Poissonniers for lines ending in 4) x5 represents the 18th arrondissement and the 19th arrondissement (from Porte de la Chapelle to Porte des Lilas) x6 represents the 20th arrondissement and the 12th arrondissement (from Porte de Bagnolet to Porte de Charenton) x7 represents the 13th arrondissement (from Quai d'Ivry to Cité Universitaire) x8 represents the 14th arrondissement (from Montsouris to Porte de Vanves) x9 represents the 15th arrondissement (from Porte de Vanves to Pont du Garigliano)

0 and 1 are used as "wildcards" for lines whose rightful indice is already taken, or for lines ending inside of Paris (40 or 91 for example).

A deep reorganization of the Paris bus network took place on April the 20th 2019. Although it didn't change the overall scheme mentioned above, it brought several irregularities, such as lines & no longer starting from Saint Lazare train station while brand new line doesn't even approach it, line now cut long before the Gare de l'Est, line that doesn't even approach the Gare du Nord, or lines & that do not start from the center of Paris.

Bus services

RATP operates 70 bus lines within the city of Paris proper, and a little over 200 bus lines in Paris suburbs.

In 2017, 1.15 billion journeys were made on RATP bus lines, including 382 million journeys on Paris lines and 768 million journeys on suburbs lines.

Paris buses Bus Between And Levallois–Louison Bobet Porte des Lilas Porte de Saint-Ouen Stade Charléty–Porte de Gentilly Gare Saint-Lazare Porte de Saint-Cloud Panthéon (Gare d'Austerlitz additional shuttles at peak hours) Ecole Vétérinaire de Maisons-Alfort Bibliothèque François Mitterrand Vitry-sur-Seine–Duras (no service on end of evenings & on weekends) Gare Saint-Lazare Nation Gare Saint-Lazare Porte d'Ivry Porte de Clichy Gare Montparnasse Gare Saint-Lazare Porte de Montempoivre Pigalle Hôpital Européen Georges-Pompidou Gare de l'Est Charles de Gaulle–Étoile Gare de l'Est (Gare Saint-Lazare on evenings & on Sundays) Porte d'Auteuil Gare de l'Est Mairie d'Aubervilliers Porte de la Chapelle Porte d'Orléans Gare du Nord Issy–Frères Voisin Jules Joffrin –Mairie du 18è Le Peletier via Sacré-Cœur Gare Saint-Lazare Boulogne–Île Seguin Gare du Nord Neuilly-sur-Seine–Bagatelle Concorde Aubervilliers–France-Asie Gare du Nord Château de Vincennes Châtelet Fort du Kremlin-Bicêtre Gare du Nord Porte des Lilas Opéra (Charles de Gaulle–Étoile on evenings) Parc de Saint-Cloud (Porte d'Auteuil on evenings) Porte d'Aubervilliers Asnières–Gennevilliers–Gabriel Péri Porte de Clignancourt Château de Vincennes Porte de Bagnolet –Louis Ganne Arcueil-Laplace Châtelet Vanves–Lycée Michelet Place d'Italie Gare de Clamart Gambetta Porte de Montmartre Place d'Italie Église de Pantin Porte de France Porte de Saint-Cloud Gare de Lyon Porte de la Muette Porte des Lilas Denfert-Rochereau Opéra Saint Ouen - Les Docks Palais Royal–Musée du Louvre Stade Charléty–Porte de Gentilly Place de Clichy Châtillon–Montrouge Gambetta Champ de Mars Hôtel de Ville Suresnes–De Gaulle Porte de la Villette Bibliothèque François Mitterrand Gare de Lyon Parc de Saint-Cloud Musée d'Orsay La Garenne-Colombes–Charlebourg (La Défense on end of evenings & on Sundays) Châtelet Clichy–Berges de Seine Panthéon Porte de Pantin Châtelet Bagnolet–Louise Michel Gare de Lyon Joinville-le-Pont Jules Joffrin –Mairie du 18ème Porte de Versailles Luxembourg Neuilly-sur-Seine–Hôpital Américain Porte d'Ivry Invalides Panthéon–Mairie du 5ème Levallois–Alsace Châtelet Saint-Ouen–Les Docks Champ de Mars Saint-Mandé–Demi-Lune–Parc Zoologique Invalides (Jussieu –Minéraux additional shuttles at peak hours) Porte de Reuilly Porte d'Auteuil Montsouris –Tombe Issoire Porte de France Gare de Vanves–Malakoff Gare Montparnasse Gare du Nord Porte d'Orléans Porte de Champerret Invalides Suresnes–De Gaulle Gare Montparnasse Pont de Levallois Porte de Vanves Porte de Montmartre Gare Montparnasse Porte des Lilas Porte d'Asnières –Marguerite Long Pont du Garigliano–Hôpital Européen Georges-Pompidou

Suburban buses