Pontoise (French pronunciation: [pɔ̃twaz]) is a commune north of Paris, France. It is located 28.4 km (17.6 mi) from the centre of Paris, in the "new town" of Cergy-Pontoise.

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Pontoise
Subprefecture and commune
A view of the cathedral of Saint-Maclou, from the Garden of Five Senses, on the promontory of the castle
Coat of arms
Location (in red) within Paris inner and outer suburbs
Location of Pontoise
Pontoise Show map of France Pontoise Show map of Île-de-France (region)
Coordinates: 49°03′06″N 2°06′06″E
Country	France
Region	Île-de-France
Department	Val-d'Oise
Arrondissement	Pontoise
Canton	Pontoise
Intercommunality	Cergy-Pontoise
Government
• Mayor (2020–2026)	Stéphanie Von Euw[1]
Area 1	150,000 km2 (60,000 sq mi)
Population  (2021)[2]	32,405
• Density	0.22/km2 (0.56/sq mi)
Time zone	UTC+01:00 (CET)
• Summer (DST)	UTC+02:00 (CEST)
INSEE/Postal code	95500 /00000
Elevation	22–87 m (72–285 ft) (avg. 27 m or 89 ft)
1 French Land Register data, which excludes lakes, ponds, glaciers > 1 km2 (0.386 sq mi or 247 acres) and river estuaries.

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Pontoise is the official préfecture (capital) of the Val-d'Oise département, although in reality the préfecture building and administration, as well as the department council (conseil général), are located in the neighboring commune of Cergy, which is regarded as the de facto capital of Val-d'Oise.

Pontoise is also the seat of the Arrondissement of Pontoise. The sous-préfecture building and administration, unlike the préfecture, are located inside the commune of Pontoise.

Known for being a violent city in the late 20th century, with a criminal rate of 137.62 incidents per 1000 inhabitants, Cergy-Pontoise has enjoyed a significant decrease in violence in the first decade of the 21st century. By 2008, the rate had declined to 99.87, although this is still considered high.^[3] That rate has continued to decline in the second decade.

Pontoise is the historical capital of the Vexin français. Its foundation dates from Roman times (Pontisara). At that time, the rock peak overhanging the river Oise supported the defense of the fort which was on the Roman road, the Chaussée Jules César, between Lutetia (Paris) and Rotomagus (Rouen). The road still exists and is now part of the N14 from Paris to Rouen. It is also known to many people as the birthplace of the alchemist Nicholas Flamel. With an over 2,000 year legacy, Pontoise still has vestiges of the past, such as medieval lanes, convents, churches and museums, and was awarded the "City of Art and History Label" in 2006. The impressionist painter Camille Pissarro made it famous through many paintings which are present nowadays in the most famous art galleries in the world.

Pontoise has a oceanic climate (Köppen climate classification Cfb). The average annual temperature in Pontoise is 12.5 °C (54.5 °F). The average annual rainfall is 666.7 mm (26.25 in) with December as the wettest month. The temperatures are highest on average in July, at around 20.5 °C (68.9 °F), and lowest in January, at around 5.3 °C (41.5 °F). The highest temperature ever recorded in Pontoise was 40.0 °C (104.0 °F) on 1 July 2015; the coldest temperature ever recorded was −12.5 °C (9.5 °F) on 1 January 1997.

Pontoise is served by Pontoise station, a terminus on Paris RER line C and an intermediate terminus for suburban trains originating from Gare Saint-Lazare as well as a terminus for suburban trains from Gare du Nord. Some trains originating at Gare Saint-Lazare continue onto Gisors. For bus services, Stivo (formerly Services des Transports de l'Agglomération Nouvelle) operates within the new town of Cergy-Pontoise, and in and around Pontoise, with transport interchanges situated Place Charles de Gaulle and Parking Canrobert.

Pontoise – Cormeilles Aerodrome is the area airport.

Public preschool through elementary schools include:^[7]

• Seven preschools ('maternelles): des Cordeliers, Eugène-Ducher, de l'Hermitage, Laris, Ludovic-Piette, Jean-Moulin, Parc-aux-Charettes
• Two primary schools: École primaire Gustave-Loiseau and École primaire des Maradas
• Seven elementary schools (élémentaires): Paul-Cézanne, Eugène-Ducher, de l'Hermitage, des Larris, Jean-Moulin, Ludovic-Piette, Parc-aux-Charrettes

Public senior high schools/sixth-form colleges:

• Lycée Camille Pissarro Pontoise^[8]
• Lycée Alfred Kastler de Cergy-Pontoise, in Pontoise, also serves Cergy^[9][10]

There are also six private schools: École Saint-Martin-de-France (up to senior high school), École "Ella", École Saint-Louis, Établissement Vauban, Notre-Dame-de-la-Compassion (junior and senior high school)^[7]

Pontoise is one of the capitals of the impressionist movement. Many painters took as a starting point the city and its area for the creation of landscapes. Camille Pissarro lived there for seventeen years. Other artists lived or worked in the area such as Vincent van Gogh (Auvers-sur-Oise), Paul Cézanne, Paul Gauguin, Charles-François Daubigny, Gustave Caillebotte, Gustave Loiseau, etc.

• Cathédrale Saint-Maclou de Pontoise. It was built in the 12th century and reconstructed and enlarged in the 15th and 16th centuries. The tower, as well as the central portal, is in flamboyant style. The central body is flanked by Renaissance additions. The remaining 12th century part of the cathedral is to the back. To the North of the building is a Renaissance portal.
• Musée de Pontoise (Musée Tavet-Delacour). The museum houses sculptures from the Middle Ages, manuscripts from the seventeenth century and paintings from the twentieth century
• Musée Pissarro (Impressionist collections) and garden of the five senses. The Museum is situated in a bourgeois house at the entrance of the old castle.

Parks:^[11]

• Le Jardin de la Ville
• Le Parc des Larris
• Le jardin partagé de Marcouville
• Le Jardin des Cinq Sens
• Le Parc du Château de Marcouville
• Les jardins et la terrasse basse du Dôme
• Le Jardin des Lavandières
• Plaines de jeux

• Sébastien Carole (b. 1982), footballer
• Yarouba Cissako, footballer
• Koumba Cisse handball player
• Nicolas Flamel (c. 1340-1418), reputed alchemist, probably born here
• Jérémy Labor (b. 1992), footballer
• Christophe Lebon (b. 1982), swimmer
• Luc Loubaki, basketball player
• Édouard-Alfred Martel (1859-1938), Father of modern speleology
• Guiday Mendy (b. 1986), basketball player
• Aly Ndom, footballer
• Camille Pissarro, painter
• Yoann Rapinier, athlete
• Jacques Vallée, author, ufologist and former astronomer
• Jean-Éric Vergne, former Formula One driver currently competing in Formula E
• St William of Pontoise, hermit
• Rabbi Moses ben Abraham of Pontoise, 12th-century disciple of Rabbeinu Tam and mentioned in several Tosafot.
• Moussa Dembélé (French footballer), footballer
• Liza del Sierra, pornographic actress.
• A famous religious sister, Blessed Marie de l'Incarnation (1566-1618), formerly known as Madame Acarie, the foundress of the Reformed Carmelites in France, lived, died and was buried here in the Carmelite Monastery.^[12][13]
• William of Pontoise (d. 1192), medieval Benedictine
• Yacine Qasmi , moroccan footballer

• Communes of the Val-d'Oise department