Seyssel, Ain

{{Use dmy dates|date=July 2023}}

{{short description|Commune in Auvergne-Rhône-Alpes, France}}

{{Expand French|topic=geo|date=December 2008|Seyssel (Ain)}}

{{Infobox French commune

|name = Seyssel

|commune status = Commune

|image = Seyssel rive Ain.JPG

|caption = Town center seen from Seyssel, Haute-Savoie

|image coat of arms = Blason ville fr Seyssel (Ain).svg

|arrondissement = Belley

|canton = Plateau d'Hauteville

|INSEE = 01407

|postal code = 01420

|mayor = Michel Botteri{{cite web|title=Répertoire national des élus: les maires|url=https://www.data.gouv.fr/fr/datasets/r/2876a346-d50c-4911-934e-19ee07b0e503|publisher=data.gouv.fr, Plateforme ouverte des données publiques françaises|date=13 September 2022|language=fr|access-date=7 May 2024|archive-date=28 June 2020|archive-url=https://web.archive.org/web/20200628030259/https://www.data.gouv.fr/fr/datasets/r/2876a346-d50c-4911-934e-19ee07b0e503|url-status=live}}

|term = 2020–2026

|intercommunality = CC Usses et Rhône

|coordinates = {{coord|45.9558|5.8319|format=dms|display=inline,title}}

|elevation m = 258

|elevation min m = 250

|elevation max m = 332

|area km2 = 2.40

|population = {{France metadata Wikidata|population_total}}

|population date = {{France metadata Wikidata|population_as_of}}

|population footnotes = {{France metadata Wikidata|population_footnotes}}

}}

Seyssel ({{IPA|fr|sɛsɛl}}; {{langx|frp|Sèssél}}) is a commune in the Ain department in eastern France. It lies on the west (right) bank of the Rhône.

The part of the town across the Rhône is also named Seyssel but located in the Haute-Savoie department, and is locally referred as Seyssel-Savoie. It is a rare case in France of two homonymous communes adjacent to each other, similar to the situation of the village of Saint-Pierre-d'Entremont, divided between the communes of Saint-Pierre-d'Entremont (Isère) and Saint-Pierre-d'Entremont (Savoie).