Saint-Hilaire-de-Riez, located in the Vendée department of Pays-de-la-Loire, boasts a history extending back to the Gallo-Roman era, evidenced by archaeological discoveries on its territory.

Geographically, the commune is characterized by a diverse landscape encompassing the Atlantic coastline with sandy beaches and dunes, the inland bocage with hedged farmland, and the marshland known as the Marais Breton Vendéen.

The population of Saint-Hilaire-de-Riez has experienced substantial growth in recent decades, transforming from a primarily agricultural village into a popular tourist destination and residential area for retirees and families.

Historically, the area around Saint-Hilaire-de-Riez was involved in the Vendée Wars during the French Revolution, a period of intense conflict between royalist supporters and republican forces.

The local economy is heavily reliant on tourism, with numerous campsites, hotels, and restaurants catering to visitors seeking seaside vacations and outdoor activities.

Oysters are a significant part of the local aquaculture industry, cultivated in the nearby Marais Breton Vendéen and contributing to the region's gastronomic reputation.

The church of Saint-Hilaire, originally built in the 11th century but significantly reconstructed over time, stands as a notable architectural landmark showcasing Romanesque and Gothic elements.

The coastline is punctuated by rocky headlands, such as the Corniche Vendéenne, offering panoramic views of the Atlantic Ocean and attracting hikers and nature enthusiasts.

Saint-Hilaire-de-Riez hosts several annual festivals, including the Fête de la Mer (Sea Festival) celebrating maritime traditions and local seafood.

The Marais Breton Vendéen, a vast network of salt marshes and canals near Saint-Hilaire-de-Riez, provides a valuable ecosystem for numerous bird species and is a protected natural area.

Local traditions include the perpetuation of Vendée folklore, with occasional performances of traditional music and dance showcasing regional heritage.

While not directly a UNESCO site, the Marais Breton Vendéen contributes to the broader significance of the Loire Valley landscape, recognized by UNESCO for its cultural importance.

The presence of numerous megalithic stones and dolmens in the vicinity suggests that the area was inhabited since prehistoric times, adding to its historical depth.

Saint-Hilaire-de-Riez's proximity to larger urban centers like Saint-Gilles-Croix-de-Vie allows residents access to broader services and employment opportunities beyond the commune itself.

The coastal erosion along certain sections of the beach represents an ongoing environmental challenge, requiring the implementation of coastal management strategies to protect infrastructure and natural habitats.