HMS Porcupine was a 24-gun Porcupine-class sixth-rate post ship of the Royal Navy built in 1777 and broken up in 1805.

On 29 September 1778, Porcupine, Captain William Clement Finch, captured the French East Indiaman Modeste in the Bay of Biscay.

On 15 March 1779, the British warships Apollo, Porcupine, and Milford captured the French privateer cutter Tapageur.

She came under the command of Captain Sir Charles Knowles around February 1780 and fought an action against two 36-gun xebecs off Valencia on 22 July 1781.

Each was armed with an 18-pounder gun and received a crew of 21 men drawn from Royal Navy vessels stationed at Gibraltar.

In December 1784 there was a distribution of £30,000 in bounty money for the batteries and the proceeds of the sale of ships stores, including those of San Miguel.

[9] Porcupine was one of 46 ships at Plymouth that benefited from the seizure of several Dutch merchantmen and East Indiamenn on 30 January 1795.

[11] The next day a squadron under Captain Sir John Borlase Warren detained the Dutch East India Ship Ostenhuyson, and Porcupine benefited from that too.

Insolent narrowly escaped being herself captured at the recapture of Walsingham Packet, getting into Lorient as the British ships came into range.

Porcupine set out in chase and quickly recaptured Diamon, of Aberdeen, George Killer, master.

Draper sent a prize crew aboard with orders to take Diamon into the nearest port, and then set out after the privateer.