One of the oldest tree foods known, the walnut is prized both as a snack and as an ingredient across baking, confectionery and savoury cooking.

It is the only common nut significantly rich in plant-based omega-3 (ALA) fatty acids, and also supplies antioxidants, protein and fibre, credentials increasingly emphasised to health-conscious consumers. Demand is rising as walnuts shift from a traditional baking ingredient toward everyday healthy snacking. China is the largest producer at around 1.5 million tonnes (in-shell), followed by the United States (California), with Iran, Turkey, Chile, the European Union and Ukraine completing the leading origins. Global production is approximately 2.7 million tonnes in-shell, with the United States and China together accounting for over three-quarters of output.

Quick Facts

• One of the oldest cultivated tree foods, dating back thousands of years
• The only common nut with a significant amount of plant-based omega-3 (ALA) fatty acids
• China produces around 1.5 million tonnes in-shell — over half the world's supply
• Leading origins: China, United States (California), Iran, Turkey, Chile
• Global production: approx. 2.7 million tonnes in-shell
• China overtook the United States in 2025 to become the world's largest walnut exporter
• US and China together account for over 75% of global output
• Increasingly marketed as an everyday "healthy snacking" nut rather than just a baking ingredient