Yonne

**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* () and from this name come the name of the river and of the people living in the department: *Icaunais*.

## History
During Roman times, the main city in the territory of the present department was Sens, the capital of one Roman province. It was formed from combined parts of the old provinces of *Burgundy*, *Champagne* and *Île-de-France*.

The department borders with five departments in four regions:
* Bourgogne-Franche-Comté region
** Côte-d'Or (east)
** Nièvre (south)
* Grand Est region
** Aube (northeast)
* Centre-Val de Loire region
** Loiret (west)
* Île-de-France region
** Seine-et-Marne (northwest)

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.

### Climate
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 . The warmest month, on average, is July with an average temperature of . The coolest month, on average is January, with an average temperature of .

The average amount of precipitation for the year in Auxerre is . The month with the most precipitation on average is December with  of precipitation. The month with the least precipitation on average is April with an average of .

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:

# Auxerre-1 (8901)
# Auxerre-2 (8902)
# Auxerre-3 (8903)
# Auxerre-4 (8904)
# Avallon (8905)
# Brienon-sur-Armançon (8906)
# Chablis (8907)
# Charny (8908)
# Cœur de Puisaye (8909)
# Gâtinais en Bourgogne (8910)
# Joigny (8911)
# Joux-la-Ville (8912)
# Migennes (8913)
# Pont-sur-Yonne (8914)
# Saint-Florentin (8915)
# Sens-1 (8916)
# Sens-2 (8917)
# Thorigny-sur-Oreuse (8918)
# Tonnerrois (8919)
# Villeneuve-sur-Yonne (8920)
# Vincelles (8921)

## Demographics
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  inhabitants/km2. The *arrondissement* of Auxerre, with 179,922 inhabitants, is the *arrondissement* with more inhabitants.

**Evolution of the population in Yonne**

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 bar:1968 from:0 till: 283376
 bar:1975 from:0 till: 299851
 bar:1982 from:0 till: 311019
 bar:1990 from:0 till: 323096
 bar:1999 from:0 till: 333221
 bar:2006 from:0 till: 340091
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 bar:1975 at: 299851 fontsize:S text: 299,851 shift:(-18,5)
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 bar:1990 at: 323096 fontsize:S text: 323,096 shift:(-18,5)
 bar:1999 at: 333221 fontsize:S text: 333,221 shift:(-18,5)
 bar:2006 at: 340091 fontsize:S text: 340,091 shift:(-18,10)
 bar:2014 at: 341814 fontsize:S text: 341,814 shift:(-18,10)

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

## Gallery

File:1240-Auxerre.jpg|Auxerre and the Yonne river
File:Léglise Saint-Maurice et lYonne à Sens (2637691088).jpg|Sens on the Yonne river
File:Avallon-Tour de l'Horloge depuis la place de la Collégiale Saint-Lazare.jpg|Avallon
File:2012-DSC 0335-Villeneuve-sur-Yonne-Porte-de-Joigny.jpg|Villeneuve-sur-Yonne 

## Related pages
* Arrondissements of the Yonne department
* Communes of the Yonne department

## References
## Other websites
* General Council website 
* Prefecture website  
* Wild flowers of Yonne