Côte de Sézanne is a subregion of Champagne located to the southeast of Épernay. It is characterized by its predominantly chalky soils and a climate that is slightly warmer than other parts of Champagne. The region is primarily known for the production of Chardonnay, which thrives in the local terroir. The vineyards are situated on slopes that provide good drainage and exposure to sunlight, contributing to the quality of the grapes. Key producers in this area focus on crafting both non-vintage and vintage Champagnes.