The Royal Canadian Navy (RCN; French: Marine royale canadienne) is the naval force of Canada. The RCN is one of three environmental commands within the Canadian Armed Forces. As of 2021, the RCN operates 12 frigates, four attack submarines, 12 coastal defence vessels, eight patrol class training vessels, one offshore patrol vessels, and several auxiliary vessels. The RCN consists of 8,570 Regular Force and 4,111 Primary Reserve sailors, supported by 3,800 civilians. Vice-Admiral Craig Baines is the current commander of the Royal Canadian Navy and chief of the Naval Staff.Founded in 1910 as the Naval Service of Canada (French: Service naval du Canada) and given royal sanction on 29 August 1911, the RCN was amalgamated with the Royal Canadian Air Force and the Canadian Army to form the unified Canadian Armed Forces in 1968, after which it was known as Maritime Command (French: Commandement maritime) until 2011.

In 2011, its historical title of "Royal Canadian Navy" was restored. Throughout its history, the RCN has served in the First and Second World Wars, the Korean War, the Persian Gulf War, Afghanistan, and numerous United Nations peacekeeping missions and NATO operations.