Paris (French pronunciation: [paʁi] ) is the capital and largest city of France. With an estimated population of 2,048,472 in January 2025 in an area of more than 105 km2 (41 sq mi), Paris is the fourth-most populous city in the European Union and the 30th most densely populated city in the world in 2022. Since the 17th century, Paris has been one of the world's major centres of finance, diplomacy, commerce, culture, fashion, and gastronomy. Because of its leading role in the arts and sciences and its early adoption of extensive street lighting, Paris became known as the City of Light in the 19th century.

The City of Paris is the centre of the Île-de-France region, or Paris Region, with an official estimated population of 12,271,794 in January 2023, or about 19% of the population of France. The Paris Region had a nominal GDP of €765 billion (US$1.064 trillion when adjusted for PPP) in 2021, the highest in the European Union. According to the Economist Intelligence Unit Worldwide Cost of Living Survey, in 2022, Paris was the city with the ninth-highest cost of living in the world.

Paris is a major railway, highway, and air-transport hub served by two international airports: Charles de Gaulle Airport, the third-busiest airport in Europe, and Orly Airport. Paris has one of the most sustainable transportation systems and is one of only two cities in the world that received the Sustainable Transport Award twice. Paris is known for its museums and architectural landmarks: the Louvre received 8.9 million visitors in 2023, on track for keeping its position as the most-visited art museum in the world. The Musée d'Orsay, Musée Marmottan Monet and Musée de l'Orangerie are noted for their collections of French Impressionist art. The Pompidou Centre, Musée National d'Art Moderne, Musée Rodin and Musée Picasso are noted for their collections of modern and contemporary art. The historical district along the Seine in the city centre has been classified as a UNESCO World Heritage Site since 1991.

Paris is home to several United Nations organisations including UNESCO, as well as other international organisations such as the OECD, the OECD Development Centre, the International Bureau of Weights and Measures, the International Energy Agency, the International Federation for Human Rights, along with European bodies such as the European Space Agency, the European Banking Authority and the European Securities and Markets Authority. The football club Paris Saint-Germain and the rugby union club Stade Français are based in Paris. The 81,000-seat Stade de France, built for the 1998 FIFA World Cup, is located just north of Paris in the neighbouring commune of Saint-Denis. Paris hosts the French Open, an annual Grand Slam tennis tournament, on the red clay of Roland Garros. Paris hosted the 1900, the 1924, and the 2024 Summer Olympics. The 1938 and 1998 FIFA World Cups, the 2019 FIFA Women's World Cup, the 2007 and 2023 Rugby World Cups, the 1954 and 1972 Rugby League World Cups, as well as the 1960, 1984 and 2016 UEFA European Championships were held in Paris. Every July, the Tour de France bicycle race finishes on the Avenue des Champs-Élysées.