Mercadona maintains leading market share in Spanish supermarket sector

Mercadona remains the leading supermarket chain in Spain, holding a 27.4 percent market share by value. While the company continues to grow slightly, reports indicate it has faced challenges in retaining customers for large weekly grocery shops, particularly among families, since late 2025.

Other major players in the Spanish retail landscape include Carrefour, which holds 9 percent of the market, and Lidl, which follows with 7.3 percent. Lidl has seen growth by focusing on private labels and a more limited assortment, often providing lower prices for standard grocery baskets compared to Mercadona and Carrefour.

Dia maintains the largest physical network in the country with over 2,400 stores, though its market share by value stands at 4.1 percent. The competitive environment is intensifying as Spanish households increasingly distribute their spending across multiple chains to manage costs and seek better prices on essential items like dairy, oils, and preserves.