Domaine Mercier is a family-run winery in the Vendée region of France, known for its winemaking expertise and wines rooted in the distinctive terroir of the southern Loire. Its vineyards grow on an ancient clay-limestone island rich in flint, near the Marais Poitevin. A warm, temperate oceanic climate and steady maritime breezes help shape the growing conditions and character of the grapes.

The estate produces Loire and Vendée wines under AOC Fiefs Vendéens, IGP and Vin de France designations, as well as traditional-method sparkling wines. Its range includes white, rosé, red and sparkling cuvées, available for purchase through the estate and its online shop. Domaine Mercier welcomes visitors to learn about winemaking, tour the property and taste its wines.

The business also offers wine-tourism activities and facilities for seminars, and provides a dedicated space for trade customers. As part of the wider Groupe Mercier, recognized for producing grapevine plants for French and international growers, the estate places strong emphasis on the vine and on crafting wines that express their origins