Built in 1765, Deptford.
Broken up in 1813.
- 1778 Capt. Joshua ROWLEY, With A. KEPPEL's fleet at the battle of Ushant 27 July.
- 1781 Capt. Francis REYNOLDS (later took surname MORETON, Lord DUCIE), with Sir Samuel HOOD in action with de Grasse on 29 April and Ad. GRAVES in action off the Chesapeake on 5 September.
- 1782 with Sir Samuel HOOD at St. Kitts on 25 January, and the battle off the Saintes on 12 April.
- 1793 Capt. Sir James WALLACE.
Sailed from St. Helens's on 14 July with the Channel fleet, four days later she damaged BELLEROPHON in a collision and the latter ship had to return to port.
The fleet entered Torbay on the 23rd. and, at the end of the month, went in search of a French fleet supposed to be covering a convoy from the West Indies.
They sighted them but contrary winds prevented them closing, the fleet returned to Torbay on 10 August and the French entered Brest.
- With Rear Ad. Alan GARDNER's squadron in an unsuccessful attack on Martinique in co-operation with French Royalists.
- 1795 Capt. ELPHINSTON, flag ship of Vice Ad. Sir George Keith ELPHINSTON, His squadron of seven ships, carrying a detachment of the 78th. regiment, arrived in Simon's Bay early in July.
When the Dutch governor declined to put the colony under British protection, the soldiers and marines were landed on 14 July and seized Simon's Town.
With 100 seamen as reinforcements, and assisted by the ships and boats of the squadron, the army then advanced towards Capetown.
After a convoy of 14 East Indiamen with more troops and supplies arrived at the beginning of September the Dutch had no option but to surrender on the 16th.
- 1796 On 16 August a Dutch squadron, which had arrived in Saldanha Bay on the 6th., surrendered without fighting to the vastly superior British squadron which came up from Simon's Bay.
ELPHINSTONE gave up his command in October and returned to England in MONARCH.
- 1797 Capt. Edward O'BRIAN, flag of Vice Ad. Richard ONSLOW.
In the action off Camperdown with the Dutch fleet on 11 October.
MONARCH led the larboard division which broke through the rear of the Dutch line between JUPITER and HAARLEM, firing broadsides into both.
The British captured 7 ships of the line, two 50's, and two frigates before Ad. DUNCAN gave up the chase when he found himself approaching the shoaling waters off the coast.
MONARCH suffered severe damage to her hull but little to her masts and yards. She had 36 killed, including two midshipmen, J. P.TINDALL and Moyle FINLAY, and 100 wounded, including Lieut. James RETALICK.
- 1799 Capt. SUTTON, Sheerness.
- 1800 Capt. J. R. MOSSE, flag ship of Vice Ad.A. DICKSON, Yarmouth Roads. She sailed on 12 March with the fleet bound for the Baltic.
On the 30th. she led the ships passing from the Kattegat into the Sound, coming under fire from the Danish batteries, and anchored off the island of Hveen about midday.
On 7 April she was with Lord NELSON's squadron which carried out the attack on the defences of Copenhagen, being seventh in line.
MONARCH suffered more losses than any other ship, 56 killed, including her captain, and 161 wounded, including Lieut. William MINCHIN.
The first lieutenant, John YELLAND, took command.
MONARCH grounded after the armistice but GANGES pushed her off and she and ISIS were sent home with the wounded while the rest of the fleet continued into the Baltic.
- 1803 Out of commission at Chatham.
- 1807 Capt. LEE, Channel fleet.