Frossay (French pronunciation: [fʁɔsɛ] ^ⓘ; Gallo: Froczaè, Breton: Frozieg) is a commune in the Loire-Atlantique department in western France.

Key Information

Frossay Froczaè (Gallo) Frozieg (Breton)
Commune
Lock on Frossay Marsh
Coat of arms
Location of Frossay
Frossay Location within France Show map of France Frossay Location within Pays de la Loire Show map of Pays de la Loire
Coordinates: 47°14′42″N 1°55′59″W / 47.245°N 1.9331°W / 47.245; -1.9331
Country	France
Region	Pays de la Loire
Department	Loire-Atlantique
Arrondissement	Saint-Nazaire
Canton	Saint-Brevin-les-Pins
Intercommunality	Sud-Estuaire
Government
• Mayor (2020–2026)	Sylvain Scherer[1]
Area 1	57.22 km2 (22.09 sq mi)
Population  (2023)[2]	3,307
• Density	57.79/km2 (149.7/sq mi)
Time zone	UTC+01:00 (CET)
• Summer (DST)	UTC+02:00 (CEST)
INSEE/Postal code	44061 /44320
Elevation	0–47 m (0–154 ft)
1 French Land Register data, which excludes lakes, ponds, glaciers > 1 km2 (0.386 sq mi or 247 acres) and river estuaries.
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1. ^ "Répertoire national des élus: les maires" (in French). data.gouv.fr, Plateforme ouverte des données publiques françaises. 13 September 2022.
2. ^ "Populations de référence 2023" (in French). National Institute of Statistics and Economic Studies. 18 December 2025.
3. ^ Des villages de Cassini aux communes d'aujourd'hui: Commune data sheet Frossay, EHESS (in French).
4. ^ Population municipale entre 1968 et 2023, INSEE

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