Alençon (UK: /æˈlɒ̃sɒ̃/, US: /ˌælɒ̃ˈsoʊn/, French: [alɑ̃sɔ̃] ; Norman: Alençoun) is a commune in Normandy, France, and the capital of the Orne department. It is situated 173 kilometres (107 mi) west of Paris. Alençon belongs to the intercommunality of Alençon (with 52,000 people).

The name of Alençon is first recorded in a document dated in the seventh century. During the tenth century, Alençon was a buffer state between Normandy and the Maine regions.

In 1049–1051, William Duke of Normandy, later known as William the Conqueror and king of England, laid siege to the town, which had risen in support of the Count of Anjou along with two other towns of the Bellême estates, Domfront (then in Maine) and Bellême (held directly from King Henry I of France). According to Duke William's chaplain and panegyrist, William of Poitiers, the defenders of the fortress refused to surrender and mockingly waved animal hides from the castle walls, referencing William's lineage as the grandson of a tanner. In response to this, William had 32 prisoners of the town's hands and feet cut off, prompting a sudden surrender. Upon hearing of this event, the town of Domfront also surrendered.

Alençon was occupied by the English during the Anglo-Norman wars of 1113 to 1203.

The city became the seat of a dukedom in 1415, belonging to the sons of the King of France until the French Revolution, and some of them played important roles in French history: see Duke of Alençon. The French Revolution caused relatively little disorder in this area, although there were some royalist uprisings nearby.

A long-standing local fabric industry gave birth to the town's famous point d'Alençon lace in the 18th century. The economic development of the nineteenth century was based on iron foundries and mills in the surrounding region. In the first half of the twentieth century the city developed a flourishing printing industry.

Alençon was home to Sts. Louis Martin and Marie-Azélie Guérin, the parents of St. Thérèse of Lisieux. They were the first spouses in the history of the Catholic Church to be proposed for sainthood as a couple, in 2008. Zélie and Louis were married at the Basilica of Notre-Dame in Alençon on 13 July 1858 and spent their whole married life in Alençon, where Thérèse was born in January 1873 and spent her early childhood until the death of her mother in 1877. Beatification of Louis and Zelie Martin - Saint Therese of Lisieux

On 17 June 1940, the German Army occupied Alençon. On 12 August 1944 Alençon was the first French city to be liberated by the French Army under General Leclerc, after minor bomb damage.

After the war the population sharply increased and new industries settled. Many of these were related to plastics and the town is now a major plastics educational centre.

Alençon along with another 32 communes is part of a 3,503 hectare, Natura 2000 conservation area, called the Haute vallée de la Sarthe.

Historical population

Year Pop. ±% p.a. 1793 12,954 —     1800 12,407 −0.61% 1806 13,222 +1.07% 1821 13,955 +0.36% 1836 13,934 −0.01% 1841 13,917 −0.02% 1846 14,388 +0.67% 1851 14,760 +0.51% 1856 16,473 +2.22% 1861 16,110 −0.44% 1866 16,115 +0.01% 1872 16,037 −0.08% 1876 16,615 +0.89% 1881 17,237 +0.74% 1886 17,550 +0.36% 1891 18,319 +0.86% 1896 17,841 −0.53% 1901 17,270 −0.65%	Year Pop. ±% p.a. 1906 17,843 +0.65% 1911 17,378 −0.53% 1921 16,249 −0.67% 1926 16,044 −0.25% 1931 16,688 +0.79% 1936 17,731 +1.22% 1946 19,691 +1.05% 1954 21,893 +1.33% 1962 25,584 +1.97% 1968 31,656 +3.61% 1975 33,680 +0.89% 1982 31,608 −0.90% 1990 29,988 −0.66% 1999 28,935 −0.40% 2007 27,942 −0.44% 2012 26,305 −1.20% 2017 25,848 −0.35% 2021 25,555 −0.28%
Graphs are unavailable due to technical issues. There is more info on Phabricator and on MediaWiki.org.
Source: EHESS and INSEE (1968-2021)

The arms of Alençon are blazoned : Azure, a double-headed eagle displayed Or.

In the seventeenth century, Alençon was chiefly noted for its lace called point d'Alençon.

Today, Alençon is home to a prosperous plastics industry, and, since 1993, to a plastics engineering school.

MPO Fenêtres is a local PVC window company established in Alençon in 1970, is one of the first company in Alençon with around 170 employees (2009) and a turnover of 28 million euros in 2008. It is also the oldest French PVC window company still in business.

• Musée des Beaux-arts et de la Dentelle d'Alençon a museum dedicated to point d'Alençon and art, that has been open since 1981.

The Commune has 31 buildings and areas listed as a Monument historique

• Le Château des Ducs is a Castle built in the Middle ages.
• Municipal Library was a former Jesuit chapel built in 1620, it became the city's library in the 18th century. It was registered as a Monument in 1926.
• Prout sawmill and steam engine is a former sawmill, built in 1874, it was registered as a monument in 1995.
• Café la Renaissance, built in 1855 the cafe, its interior decor is inspired by the second French Renaissance, it was registered as a monument in 2009.
• Notre-Dame-de-Lorette Chapel is a seventeenth century chapel, it was registered as a monument in 1975.
• Basilica of Notre-Dame d'Alençon is a fifteenth century church, that was registered as a monument in 1862.
• Saint-Pierre church in the Montsor district is a church that was built in 1880, it features Mosaics made by the Facchina workshop, it was registered as a monument in 2006.
• The Wheat Market was built in 1812, featuring a 1000 m² glass dome, with a circumference of 110 metres, it was registered as a monument in 1975.
• Psychiatric hospital was built in 1774, and initially built as a hospital for the sick, the destitute, the prisoners and the mentally ill. After the revolution it was turned into a prison, then becoming a hospice, before finally becoming a psychiatric hospital. It was registered as a monument in 1974.
• Le Grand Cerf is a nineteenth century hotel, that was registered as a monument in 2008.
• Hotel Libert is a hotel dating back to the 18th century, registered as a monument in 1947.
• Hotel Radigue is a hotel dating back to the 18th century, registered as a monument in 1960. The hotel was mentioned in the Honoré de Balzac novel La Vieille Fille.
• Hôtel de la préfecture , formerly known as the Hôtel de Guise is a hotel dating back to the seventeenth century, registered as a monument in 1903.
• The Town Hall dates back to the 17th century and was registered as a monument in 1926.
• Saint-Pierre de Montsort Presbytery is a former hotel that might have served as a presbytery, it was built in 1639 and was listed as a monument in 1958.
• Saint-Léonard Lodging house is a seventeenth century house, designated as a monument in 1975.
• Pesche Pharmacy is a nineteenth century building with neo-classical decor very characteristic of the 1820s-1830s, it was listed as a monument in 1987.
• Tribunal de commerce is a fifteenth century building used as a court house for Commercial matters, it was registered as a monument in 1958.
• City Ramparts remains of the old sixteenth century ramparts, reworked on in the nineteenth century, they were listed as a monument in 1971.
• House of Ozé a fifteenth century house, built entirely from granite. The house was registered as a monument in 1903, and now acts as the Tourist office for the Commune.

There are a further eleven private buildings and houses listed as monuments with the commune.

"Écoles". Archived from the original on 2 April 2015. Retrieved 3 March 2015.

"Collèges". Archived from the original on 2 April 2015. Retrieved 3 March 2015.

"Lycées". Archived from the original on 2 April 2015. Retrieved 3 March 2015.

Alençon is linked by the A28 autoroute (motorway/freeway) with the nearby cities of Le Mans to the south (Sarthe) and Rouen (Seine-Maritime) to the north. The A88 autoroute links the A28 just north of Alençon to the coastal port of Caen.

The Alençon railway station offers regional services towards Caen, Le Mans and Tours. A comprehensive town bus system operates from 7:00 to 19:00.

Aérodrome d'Alençon - Valframbert is an Aerodrome within the commune which is also shared with neighbouring communes of Valframbert and Cerisé that opened in 1936. Its IATA airport code is XAN and its ICAO airport code is LFOF.

There is a comprehensive network of cycle paths.

• Alencon has a football team US Alençon who play at the Jacques Fould stadium.
• Hippodrome d'Alençon is a racecourse that specializes in Harness racing, it has been in operation since 1825.

Alençon is twinned with:

• Basingstoke and Deane, England, United Kingdom
• Quakenbrück, Germany

• 
  La Halle aux Blé
• 
  Château des Ducs
• 
  Library

• Alençon lace
• Communes of the Orne department

• Official website
• Alençon Tourist Office
• Shrine of Alençon: pilgrimage on the steps of St. Therese and her parents, the blessed Louis and Zelie Martin
• Website about the life, writings, spirituality, and mission of St. Therese of the Child Jesus of the Holy Face; information about the life of her family in Alençon and about pilgrimages to Alençon