HMS Dolphin (1751)
 HMS Dolphin was a 24-gun sixth-rate frigate of the Royal Navy. Launched in 1751 she was used as a survey ship from 1764 and made two circumnavigations of the world under the successive commands of John Byron and Samuel Wallis. She was the first ship to circumnavigate the world twice. She remained in service until she was paid off in September 1776 and she was broken up in early 1777.