Five ships of the Royal Navy have been called HMS Agincourt, named after the Battle of Agincourt of 1415, and construction of another was started but not completed.

• The first Agincourt was a wooden third-rate frigate bought from the East India Company in 1796.
• The second Agincourt was another wooden third-rate warship launched in 1817.
• The third Agincourt, launched in 1865, was a Minotaur-class ironclad frigates and launched in 1865.
• The most famous Agincourt, launched in 1913, was a battleship built for Turkey but taken over by the Royal Navy before delivery and was present at the Battle of Jutland.
• An Agincourt was ordered as a Queen Elizabeth-class battleship but construction was cancelled in 1914 on the outbreak of World War I before work had begun.
• The most recent Agincourt was a Battle-class destroyer launched in 1945. She was converted to a radar picket in 1959 and scrapped in 1974.