Treffendel

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

{{Infobox French commune

|name = Treffendel

|native name = {{native name|br|Trevendel}}

|commune status = Commune

|image = Treffendel - église Saint-Malo 01.JPG

|caption = The church in Treffendel

|coordinates = {{coord|48.0408|-2.0042|format=dms|display=inline,title}}

|INSEE = 35340

|postal code = 35380

|arrondissement = Rennes

|canton = Montfort-sur-Meu

|mayor = Françoise Kerguélen{{cite web|title=Répertoire national des élus: les maires|url=https://www.data.gouv.fr/fr/datasets/r/2876a346-d50c-4911-934e-19ee07b0e503|website=data.gouv.fr, Plateforme ouverte des données publiques françaises|date=2 December 2020|language=fr}}

|term = 2020–2026

|intercommunality = Brocéliande

|elevation min m = 56

|elevation max m = 143

|area km2 = 18.98

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

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

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

}}

Treffendel ({{IPA|fr|tʁɛfɑ̃dɛl}}; {{langx|br|Trevendel}}) is a commune in the Ille-et-Vilaine department in Brittany in northwestern France.