Brief IntroductionThe United States represents one of the world’s largest, most standardized, and quality-sensitive baby diaper markets. Characterized by strict federal regulations, mature supermarket retail systems, diversified consumer demands, and strong premium consumption awareness, the US baby diaper industry presents huge B2B opportunities while raising high barriers for overseas manufacturers. This article comprehensively analyzes the current US baby diaper market landscape, core consumer characteristics, mainstream supermarket procurement and product standards, and practical compliance solutions for foreign suppliers. It also summarizes key takeaways to help manufacturers develop market-aligned, retail-ready baby diapers and achieve stable penetration into the US mass retail channel.