Le Sourn

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

{{Infobox French commune

|name = Le Sourn

|native name = Ar Sorn

|commune status = Commune

|image = Le Sourn St-Michel.jpg

|caption = The chapel of Saint-Michel, in Le Sourn

|image coat of arms =

|coordinates = {{coord|48.0436|-2.9886|format=dms|display=inline,title}}

|INSEE = 56246

|postal code = 56300

|arrondissement = Pontivy

|canton = Pontivy

|mayor = Jean-Jacques Videlo{{cite web|url=https://www.morbihan.gouv.fr/content/download/45068/325032/file/Maires%20du%20Morbihan%202020%20-%20250.pdf|title=Maires du Morbihan|date=7 July 2020|publisher=Préfecture du Morbihan}}

|term = 2020–2026

|intercommunality = Pontivy Communauté

|elevation min m = 46

|elevation max m = 184

|area km2 = 16.05

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

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

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

}}

Le Sourn ({{IPA|fr|lə suʁn}}; {{langx|br|Ar Sourn}}) is a commune in the Morbihan department of Brittany in north-western France.[https://www.insee.fr/fr/metadonnees/geographie/commune/56246-le-sourn INSEE commune file]