Fontrieu

{{Infobox French commune

|name = Fontrieu

|commune status = Commune

|image = Panorama de Fontrieu.jpg

|caption = A panorama of the Fontrieu landscape

|arrondissement = Castres

|canton = Les Hautes Terres d'Oc

|INSEE = 81062

|postal code = 81260

|mayor = Didier Gavalda{{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 =

|coordinates = {{coord|43.649|2.514|format=dms|display=inline,title}}

|elevation m =

|elevation min m =

|elevation max m =

|area km2 = 102.62

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

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

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

}}

Fontrieu ({{IPA|fr|fɔ̃ʁjø}}; {{langx|oc|Fontriu}}) is a commune in the Tarn department and Occitanie region of southern France. The municipality was established on 1 January 2016 by merger of the former communes of Castelnau-de-Brassac, Ferrières and Le Margnès.[https://www.legifrance.gouv.fr/eli/arrete/2015/11/18/INTB1532316A/jo/texte Arrêté préfectoral] 18 November 2015 {{in lang|fr}}