Which company manufactures the USPS Oshkosh NGDV mail truck?

Oshkosh manufactures the USPS Oshkosh NGDV mail truck, through its Oshkosh Defense subsidiary.

The Next Generation Delivery Vehicle was created to replace aging USPS delivery vehicles, especially the Grumman LLV fleet that entered service in 1987. The NGDV is purpose-built for mail and package delivery and uses a right-hand-drive layout suited to curbside routes.

USPS selected Oshkosh Defense after a lengthy competition involving several prototype suppliers. The contract allows production of gasoline-powered and battery-electric vehicles, with front-wheel-drive and all-wheel-drive variants planned. Assembly is based in Spartanburg, South Carolina.

Workhorse, Utilimaster, and Grumman are easy to confuse with the answer because each is connected to the NGDV story in a different way. Workhorse was a losing bidder, Utilimaster submitted a prototype, and Grumman manufactured the older LLV predecessor—not the Oshkosh NGDV.