Built in 1804, Plymouth.
Sold in 1902.
- In September 1800 the shipwrights were employed in erecting her frames.
A report of 2 October 1803 on HIBERNIA, then building on the CAESAR's slip in the Dockyard, said that she was "0$.
now completely planked up to her gunwales, and has her lower deck floored; when finished she will be the largest and most roomy first rate man of war in the service.
The great fault heretofore of ships of HIBERNIA's class has been that their length was by no means proportional to their height above the waterline, and their bulk and tonnage." Several gangs of painters and caulkers were put on board HIBERNIA on Tuesday 14 August 1804 and the expectation was that she would be launched on the first spring tide in October.
Actually it was Saturday 17 November, the same day as PALLAS and CIRCE, 12 years after she was first laid down.
- (On 1 January 1805 the keel of a new ship, the CALEDONIA, was laid on the slip vacated by HIRBERNIA.)
- Following a signal from the Port Admiral, HIBERNIA, Capt. William BEDFORD, left her moorings off North Jetty Head on the afternoon of 2 March 1805. She went down the harbour under the King's Pilots and came to in Cawsand Bay about 3 o'clock.
- Ad. Lord GARDNER hoisted his flag aboard HIBERNIA at Plymouth on 31 March, amidst three cheers from all the ships.
Taking the first opportunity of a favourable wind, he sailed the next day to take command of the Western Squadron off Brest.
- At the end of 1805 Vice Ad.J. DOUGLAS, Channel fleet.
- On 16 January 1806 HIBERNIA's launch was sent ashore with old stores to collect new. She was manned by a lieutenant, a midshipman and 43 seamen and, after loading, they set off to rejoin the ship in Cawsand Bay.
It was then blowing very hard, in fact hurricane force winds were to last for two days, and they were unable to reach the Indiaman in the bight of the bay and were forced to bear away and endeavour to weather the Mew Stone and get into the Yealm for the night. She failed to go outside the Mew Stone and struck the Rannie Rocks between the Shag Rock and the land and overset. The lieutenant and eighteen men were washed ashore but the midshipmen and 23 men were drowned. One seaman with his leg broken managed to crawl up a rock and a companion crept to his side for warmth; in the morning the quarrymen found the wounded man still alive but the other man had died. The bodies of the midshipman and 16 seamen were washed ashore and buried in Wembury churchyard.
- 1807 Capt. Tristram Robert RICKETTS, In February she was re-fitting in the Hamoaze.
- 1807 Capt. Charles Marsh SCHOMBERG. With the flag of Rear. Ad. Sir William Sydney SMITH.
Early in November, when the French were attempting to force Portugal to close her ports to British shipping, the rear admiral blockaded the Tagus until the Portuguese royal family agreed to transfer to Brazil, together with their fleet. The British squadron escorted them part of the way then detached four ships to see them the rest of the way.
Sir Sidney then blockaded a hostile Russian squadron in the Tagus until the end of the year.
- 1808 Capt. L. W. HALSTED, (1st.), Capt. R. J. NEVE.
- (2nd). Flagship of Ad. Sir Charles COTTON, coast of Portugal.
Capt. HALSTED arrived in London on 15 September 1808 with dispatches from Sir Charles announcing the disgraceful convention entered into by Lieut. Gen. Sir Hew Dalrymple which allowed the French army, which had been defeated at Vimiera, to evacuate Portugal with all their arms, artillery and horses and be free to fight another day.
- 1811 Capt. W. H. WEBLEY.
Flagship of Rear Ad. Sir Samuel HOOD, Mediterranean. She was engaged in the blockade of Toulon.
Lieut. William HOLMAN acted as captain of HIBERNIA for some time during 1811.
- 1812 Rear Ad.J. PELLEW (1st. Captain), Capt. C. T. SMITH (2nd Captain).
Flagship of Ad. Sir Edward PELLEW, Mediterranean.
Early in October Vice Ad. Sir Sidney SMITH joined the squadron cruising off Toulon and shifted his flag from TREMENDOUS to HIBERNIA as second in command, with Capt. Charles Thurlow SMITH.
- On 18 August 1813 the boats of HIBERNIA joined others from the fleet and attacked the batteries at Cassis, between Marseilles and Toulon.
Four gunboats and 25 merchantmen were captured or destroyed but at the cost of 4 killed and 16 wounded.
HIBERNIA lost 2 private marines killed and 4 wounded.
- 1814 Capt. T. G. CAULFIELD, Mediterranean.
On passage home in May.
- 1815 Out of commission at Plymouth.
- 1820 Portsmouth.
- In February 1845 she was commissioned by Capt. Peter Richards to serve as Vice Ad. Sir William PARKER's flagship in the Mediterranean. She was replaced by CALEDONIA and returned to Devonport where she remained out of commission until becoming base flagship of the Admiral Superintendent at Malta in 1855.
- Rear Ad Hon. Sir Montagu STOPFORD, 01/1855. Rear Ad. Henry J. CODRINGTON, 07/1858.