Paris is 105.4 km² holding 2,047,602 people, wrapped in twenty arrondissements that spiral outward from the Louvre. Almost everything a visitor comes for is inside that spiral, and most of it is walkable.
The Seine cuts the city in two and everything is described in relation to it. The Right Bank to the north holds the commerce and the great institutions; the Left Bank to the south holds the universities and the bookshops. Between them the Île de la Cité and the Île Saint-Louis are where the city started.
Practical information
Language spoken
French
English is understood in tourist districts and rarely outside them
Dialling code
+33 1
Paris and the Île-de-France; drop the leading 0 of 01 when calling from abroad
Currency
Euro (€, EUR)
Cards accepted almost everywhere; markets prefer cash
Emergency number
112
One number across the country; 15 reaches an ambulance directly
Plug type
Type C and E · 230 V
European two-pin; type E adds an earth pin in the socket
Marché des Enfants Rouges, at 39 rue de Bretagne in the Marais, is the oldest covered market still operating in Paris, tracing back to a walled market built for the neighbourhood in the early seventeenth century under Louis XIII, when…
District boundaries come from OSM administrative relations, so a district page holds exactly the places inside it — plus, for the islands and the coast, the nearest district by proximity.
The arrondissements spiral clockwise from the centre: the 1st sits at the Louvre and the Île de la Cité, and the numbers wind outward to the 20th. Learning that shape is the single most useful thing a first-time visitor can do, because every address in the city carries its arrondissement and the number tells you roughly where you are.
The Right Bank — north of the Seine — is the 1st through 4th at the centre, then the grand avenues of the 8th and 16th to the west and Montmartre in the 18th to the north. The Louvre, the Champs-Élysées, the Opéra and Sacré-Cœur are all Right Bank.
The Left Bank — south — is the 5th, 6th and 7th: the Latin Quarter, Saint-Germain, the Panthéon, the Musée d'Orsay and the Eiffel Tower. It is the older-feeling half and the one with the bookshops.
The Périphérique, completed in 1973, rings the whole of it. Inside is Paris; outside is the metropolitan area of 13,320,752 people across 18,940.7 km², which is a different thing.
The Métro, and then walking. Paris is small enough that the two together cover everything.
The Métro opened on 19 July 1900 during the World's Fair and now runs 16 lines — numbered 1 to 14 plus 3bis and 7bis — across 321 stations, 61 of which are interchanges. Stations sit 548 m apart on average, which is why a Métro journey of two stops is usually a walk. It carries 1.523 billion passengers a year, 4.17 million a day.
The RER extends further out into the suburbs and is what takes you to the airports and to Versailles. Châtelet–Les Halles, where five Métro lines meet three RER lines, is the largest interchange and the one to avoid at rush hour.
Single tickets and multi-use passes are both sold, and the Navigo Easy card is the contactless option.
Checked 2026-08-23
Common questions
How many days does Paris need?
Four to five. Three days covers the central monuments — the Louvre, Notre-Dame, the Eiffel Tower, the Champs-Élysées — at a pace that is not punishing. A fourth adds a proper museum day, and a fifth adds Montmartre or a day out at Versailles.
How do the arrondissements work?
They spiral clockwise from the centre. The 1st is at the Louvre and the Île de la Cité and the numbers wind outward to the 20th. Every Paris address carries its arrondissement, so the number tells you roughly where something is.
What is the difference between the Right Bank and the Left Bank?
The Seine. The Right Bank to the north holds the commerce and the great institutions — the Louvre, the Champs-Élysées, the Opéra, Montmartre. The Left Bank to the south holds the universities, the Latin Quarter, the Panthéon, the Musée d'Orsay and the Eiffel Tower.
Is the Métro the best way around?
For anything over a kilometre, yes. It opened on 19 July 1900 and runs 16 lines across 321 stations, with stations 548 m apart on average — which means a two-stop journey is usually faster on foot.
When is the best time to come?
April to June and September to October. August is when Parisians leave and tourists arrive, which is the worst of both — shuttered restaurants and full museums.
How big is Paris really?
The city proper is 105.4 km² with 2,047,602 people, ringed by the Périphérique completed in 1973. The metropolitan area outside it holds 13,320,752 people across 18,940.7 km².
Turn this list into a plan
Set your days, your pace and the hours you actually want to be out. The planner works around closing days and travel time, and leaves room to eat.
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