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Prefecture building of the Yonne department, in Auxerre
Prefecture building of the Yonne department, in Auxerre.
Flag of Yonne
Coat of arms
Coat of arms
Yonne in France
Yonne in France
Country France
Region Bourgogne-Franche-Comté
Département 4 March 1790
Prefecture Auxerre
Subprefectures Avallon, Sens
 • Total 7,427.4 km2 (2,867.7 sq mi)
 • Total 341,814
 • Density 46.0207/km2 (119.1930/sq mi)
Demonym(s) Icaunais
Time zone UTC+1 (CET)
 • Summer (DST) UTC+2 (CEST)
ISO 3166 code FR-89
Arrondissements 3
Cantons 21
Communes 428

Yonne is a department in the centre of France, in the Bourgogne-Franche-Comté region. The largest city in the department, and its prefecture (capital), is Auxerre.

The department is named after the Yonne river, a tributary of the Seine, that flows through the department. The Celts name of the river was Ica-onna (Latin: Icauna) and from this name come the name of the river and of the people living in the department: Icaunais.


During the Roman times, the main city in the territory of the present department was Sens, the capital of one Roman province.

Yonne is one of the original 83 departments created during the French Revolution on 4 March 1790 with Auxerre as its capital. It was formed from combined parts of the old provinces of Burgundy, Champagne and Île-de-France.

It was divided in seven districts: Auxerre, Sens, Joigny, Saint-Fargeau, Avallon, Tonnerre and Saint-Florentin.

In 1800, with the creation of the arrondissements in France, the seven districts were changed into five arrondissements: Auxerre, Avallon, Joigny, Sens and Tonnerre. On 10 September 1926, the arrondissements of Joigny and Tonnerre were eliminated.


Carte de l'Yonne
Map of Yonne.

Yonne is part of the Bourgogne-Franche-Comté region. It has an area of 7,427.4 km2 (2,868 sq mi). The highest point of the department is Bois de la Pérouse (47°18′57″N 4°1′8″E / 47.31583°N 4.01889°E / 47.31583; 4.01889 (Bois de la Pérouse)), 607 m (1,991 ft) high.

The department borders with five departments in four regions:

The northern part of the department is formed by plains that are part of the great plain of Paris. The mountains of the Morvan and the hills of the Auxerrois (the region around the city of Auxerre) are in the southern half of the department.

The main river in the department is the Yonne, a tributary of the Seine river that flows through the department from south to north. Other rivers that flow through the department are the Armançon, Loing, Ouanne and Serein rivers.


The Köppen climate classification type for the climate at Auxerre is an "Oceanic climate" (also known as Maritime Temperate climate) and of the subtype "Cfb".

The average temperature for the year in Auxerre is 11.5 °C (52.7 °F). The warmest month, on average, is July with an average temperature of 20.2 °C (68.4 °F). The coolest month, on average is January, with an average temperature of 3.6 °C (38.5 °F).

The average amount of precipitation for the year in Auxerre is 957.6 mm (37.70 in). The month with the most precipitation on average is December with 106.7 mm (4.20 in) of precipitation. The month with the least precipitation on average is April with an average of 63.5 mm (2.50 in).


Yonne is managed by the Departmental Council of Yonne in Auxerre. The department is part of the Bourgogne-Franche-Comté region.

Administrative divisions

There are 3 arrondissements (districts), 21 cantons and 428 communes (municipalities) in Yonne.

Arrondissement Capital Population
891 Auxerre Auxerre 179,922 3,514.6 51.2 171
892 Avallon Avallon 47,594 2,209.2 21.5 139
893 Sens Sens 114,298 1,703.6 67.1 118

The following is a list of the 21 cantons of the Yonne department (with their INSEE codes), following the French canton reorganisation which came into effect in March 2015:

  1. Auxerre-1 (8901)
  2. Auxerre-2 (8902)
  3. Auxerre-3 (8903)
  4. Auxerre-4 (8904)
  5. Avallon (8905)
  6. Brienon-sur-Armançon (8906)
  7. Chablis (8907)
  8. Charny (8908)
  9. Cœur de Puisaye (8909)
  10. Gâtinais en Bourgogne (8910)
  11. Joigny (8911)
  12. Joux-la-Ville (8912)
  13. Migennes (8913)
  14. Pont-sur-Yonne (8914)
  15. Saint-Florentin (8915)
  16. Sens-1 (8916)
  17. Sens-2 (8917)
  18. Thorigny-sur-Oreuse (8918)
  19. Tonnerrois (8919)
  20. Villeneuve-sur-Yonne (8920)
  21. Vincelles (8921)


The inhabitants of Yonne are known, in French, as Icaunais (women: Icaunaises).

Yonne had a population, in 2014, of 341,814, for a population density of 46.0 inhabitants/km2. The arrondissement of Auxerre, with 179,922 inhabitants, is the arrondissement with more inhabitants.

Evolution of the population in Yonne

The cities with more than 5,000 inhabitants in the department are:

City Population
Auxerre 34,843 Auxerre
Sens 25,507 Sens
Joigny 9,672 Auxerre
Avallon 7,025 Avallon
Migennes 7,019 Auxerre
Villeneuve-sur-Yonne 5,352 Sens
Charny Orée de Puisaye 5,145 Auxerre


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Kids robot.svg In Spanish: Yonne para niños

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