Three ships of the Royal Navy have borne the name HMS Princess Louisa, after Princess Louisa:
- HMS Princess Louisa was a 42-gun fifth rate launched as HMS Launceston in 1711. She was rebuilt in 1728 and renamed HMS Princess Louisa. She was wrecked in 1736.
- HMS Princess Louisa was a 60-gun fourth rate launched as HMS Swallow in 1732 and broken up in 1742.
- HMS Princess Louisa (1744) was a 60-gun fourth rate launched in 1744 and broken up by 1766.
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.