Four ships of the U.S. Navy have been named USS Maryland:

• USS Maryland (1799), a sloop during the Napoleonic Wars
• USS Maryland (ACR-8), a Pennsylvania-class cruiser, saw action in World War I, later renamed USS Frederick
• USS Maryland (BB-46), a Colorado-class battleship known as "Fighting Mary," saw action in World War II
• USS Maryland (SSBN-738), an Ohio-class ballistic missile submarine, commissioned in 1992, currently in active service