Crossac

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

{{Infobox French commune

|name = Crossac

|native name = {{native name|mis|paren=no|Croczac/Croça}} (Gallo)
{{native name|br|Kroazieg}}

|commune status = Commune

|image = Château de Lorieux, Crossac - 01.jpg

|caption = Ruins of the Château de Lorieux

|image coat of arms = Blason crossac44.svg

|arrondissement = Saint-Nazaire

|canton = Pontchâteau

|INSEE = 44050

|postal code = 44160

|mayor = Olivier Demarty{{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 = Pays de Pont-Château - Saint-Gildas-des-Bois

|coordinates = {{coord|47.4122|-2.1669|format=dms|display=inline,title}}

|elevation min m = 0

|elevation max m = 22

|area km2 = 25.85

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

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

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

}}

Crossac ({{IPA|fr|kʁɔsak|-|LL-Q150 (fra)-Pom445-Crossac.wav}}; Gallo: Croczac or Croça, {{langx|br|Kroazieg}}) is a commune in the Loire-Atlantique department in western France.