From Wikipedia, the free encyclopedia.
Three ships of the British Royal Navy have been named HMS Polyphemus, after the Polyphemus of Greek mythology.
- The first Polyphemus was a 64-gun 3rd rate launched in 1782, active in the Napoleonic Wars, converted to a powder hulk in 1813 and broken up in 1827.
- The second Polyphemus was a wooden paddlewheel sloop launched in 1840 and wrecked off Jutland in 1856.
- The third Polyphemus was a torpedo ram in use from 1881 to 1903.
The Southampton of 1936 was named Polyphemus during construction.

