Yon (river)

Yon
Country	France
Basin
Main source	Saint-Martin-des-Noyers 100 m (330 ft) 46°42′59″N 01°15′10″W / 46.71639°N 1.25278°W
River mouth	Lay 5 m (16 ft) 46°30′24″N 01°17′28″W / 46.50667°N 1.29111°WCoordinates: 46°30′24″N 01°17′28″W / 46.50667°N 1.29111°W
Physical characteristics
Length	55.6 km (34.5 mi)
Discharge	Average rate: 8 m^3/s (280 cu ft/s)

The Yon is a 55.6 km (34.5 mi) long river in the Vendée département, western France. Its source is at Saint-Martin-des-Noyers. It flows generally south. It is a right tributary of the Lay into which it flows between Rosnay and Le Champ-Saint-Père.

Communes along its course

This list is ordered from source to mouth:

• Vendée: Saint-Martin-des-Noyers, La Chaize-le-Vicomte, La Ferrière, Dompierre-sur-Yon, La Roche-sur-Yon, Nesmy, Saint-Florent-des-Bois, Chaillé-sous-les-Ormeaux, Le Tablier, Rosnay, Le Champ-Saint-Père

References

• http://www.geoportail.fr
• The Yon at the Sandre database