Guichen

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

{{Other uses|Guichen (disambiguation){{!}}Guichen}}

{{Infobox French commune

|name = Guichen

|native name = {{native name|mis|paren=no|Gischen}} (Gallo)
{{native name|br|Gwizien}}

|commune status = Commune

|image = Eglise_de_Guichen.jpg

|caption = Church of Guichen

|image coat of arms = Blason ville fr Guichen (Ille-et-Vilaine).svg

|coordinates = {{coord|47.9681|-1.7939|format=dms|display=inline,title}}

|INSEE = 35126

|postal code = 35580

|arrondissement = Redon

|canton = Guichen

|mayor = Dominique Delamarre{{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}}

|term = 2020–2026

|intercommunality = Vallons de Haute-Bretagne

|elevation min m = 7

|elevation max m = 107

|area km2 = 42.99

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

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

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

}}

Guichen ({{IPA|fr|ɡiʃɛ̃}}; {{Langx|br|Gwizien}}; Gallo: Gischen) is a commune in the Ille-et-Vilaine department in Brittany in northwestern France.