Layon

{{Short description|River in France}}

{{Infobox river

| name = Layon

| image = Layon rablay.jpg

| image_caption = The Layon at Rablay-sur-Layon

| pushpin_map = France#France Pays de la Loire

| source1_location = Saint-Maurice-la-Fougereuse

| source1_coordinates= {{coord|47|03|47|N|00|29|06|W}}

| mouth_location = Loire

| mouth_coordinates = {{coord|47|21|02|N|00|45|16|W|display=inline,title}}

| progression = {{RLoire}}

| subdivision_type1 = Country

| subdivision_name1 = France

| length = {{convert|89.9|km|mi|abbr=on}}

| source1_elevation = {{convert|105|m|ft|abbr=on}}

| mouth_elevation = {{convert|12|m|ft|abbr=on}}

| discharge1_avg = {{convert|4.05|m3/s|cuft/s|abbr=on}}

| basin_size = {{convert|950|km2|sqmi|abbr=on}}

}}

The Layon ({{IPA|fr|lɛjɔ̃|-|LL-Q150 (fra)-VictorDtmtc-layon.wav}}) is a {{convert|89.9|km|mi|abbr=on}} long river in the Deux-Sèvres and Maine-et-Loire departments in western France.{{Sandre|id=M5--0200|nom=Layon}} Its source is near Saint-Maurice-la-Fougereuse. It flows generally northwest. It is a left tributary of the Loire, into which it flows near Chalonnes-sur-Loire.