USS New Orleans (LPD-18), a San Antonio-class amphibious transport dock, is the fourth commissioned ship of the United States Navy to be named after the city of New Orleans, Louisiana.

The San Antonio class is a class of amphibious transport docks, also called a "landing platform, dock" (LPD), used by the United States Navy. These warships replace the Austin-class LPDs, as well as the Newport-class tank landing ships, the Anchorage-class dock landing ships, and the Charleston-class amphibious cargo ships that have already been retired.