Two ships of the Royal Navy have borne the name HMS Lys:
- HMS Lys (1745), a 24-gun sixth-rate vessel, captured from the French in 1745 and sold in 1749.
- HMS Lys (1755), a 64-gun third-rate ship of the line, captured from the French in 1755, commissioned for a single trans-Atlantic voyage and sold in the same year.
This article includes a list of ships with the same or similar names. If an internal link for a specific ship led you here, you may wish to change the link to point directly to the intended ship article, if one exists.