Admiralty Law – (also referred to as maritime law) is a distinct body of law which governs maritime questions and offenses. It is a body of both domestic law governing maritime activities, and private international law governing the relationships between private entities which operate vessels on the oceans. It deals with matters including marine commerce, marine navigation, shipping, sailors, and the transportation of passengers and goods by sea. Admiralty law also covers many commercial activities, although land based or occurring wholly on land, that are maritime in character.

Admiralty law is distinguished from the Law of the Sea, which is a body of public international law dealing with navigational rights, mineral rights, jurisdiction over coastal waters and international law governing relationships between nations.

Although each legal jurisdiction usually has its own enacted legislation governing maritime matters, admiralty law is characterized by a significant amount of international law developed in recent decades, including numerous multilateral treaties.