India is the country where Royal Enfield motorcycles are most commonly used. Royal Enfield is an iconic Indian motorcycle brand that has a strong presence and a large customer base in India. The company has a rich heritage in the country and has been manufacturing motorcycles there since 1955. Royal Enfield motorcycles are known for their classic design, durability, and suitability for Indian road conditions. They are highly popular among motorcycle enthusiasts and riders in India. While Royal Enfield motorcycles are exported to various countries around the world, their highest usage is still predominantly seen in India.