Amazon passed the U.S. Postal Service as the largest domestic parcel carrier in 2025, anchoring a broader market shift away from traditional couriers, as it in-sourced a large amount of last-mile delivery work previously handled by UPS, according to data published Monday by ShipMatrix Inc.
Amazon (NASDAQ: AMZN) handled 6.7 billion parcels last year, up 9.8% year over year, compared to an 8.3% decline for the U.S. Postal Service to 6.6 billion pieces. UPS (NYSE: UPS) also experienced an 8.3% volume decline at 4.4 billion deliveries. FedEx (NYSE: FDX) delivered 3.6 billion parcels in 2025, up 5.9%. Amazon’s parcel growth isn’t just fueled by its own online orders, but new contracts from third parties that don’t sell on the retailer’s platform.
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