The Costco hearing aids guide 2026 begins with a statistic that most members find genuinely surprising: Costco is now the highest-volume hearing aid retailer in the United States, accounting for approximately 16 percent of the U.S. hearing aid market in 2026 according to industry trackers. The number is remarkable because it means that one in every six hearing aids sold in America last year was sold through a Costco Hearing Aid Center — a warehouse retailer that most consumer