HMS Eagle was a 74-gun third-rate built for the Royal Navy in the first decade of the 19th century. Completed in 1804, she played a minor role in the Napoleonic Wars.
Eagle measured on the gundeck and on the keel. She had a beam of , a depth of hold of and had a tonnage of 1,723 <small></small> tons burthen. The ship's draught was forward and aft at light load; fully loaded, her draught would be significantly deeper. The Repulse-class ships were armed with 74 muzzle-loading, smoothbore guns that consisted of twenty-eight 32-pounder guns on her lower gundeck and twenty-eight 18-pounder guns on her upper gundeck. Their forecastle mounted a pair of 18-pounder guns and two 32-pounder carronades. On their quarterdeck they carried two 18-pounders and a dozen 32-pounder carronades. Above the quarterdeck was their poop deck with half-a-dozen 18-pounder carronades. Their crew numbered 590 officers and ratings. The ships were fitted with three masts and ship-rigged.
HMS Eagle was the fourteenth ship of her name to serve in the Royal Navy. She was ordered on 4 February 1800 from Thomas Pitcher as part of the first batch of three Repulse-class ships of the line designed by Sir William Rule, co-Surveyor of the Navy. The ship was laid down at Pitcher's shipyard in Northfleet in August and was launched on 27 February 1804. She was commissioned by Captain David Colby that same month. On 31 March, she was driven ashore and severely damaged at Northfleet. She was taken into dock for repairs. Eagle was completed at Woolwich Dockyard on 3 May.
On 11 November 1804, , together with Eagle, , , , Africiane, , , and the hired armed vessels Swift and Agnes, shared in the capture of the Upstalsboom, H.L. De Haase, Master.
Eagle returned to the Downs in early 1814. In January 1815 she was in Chatham dockyard undergoing repair. In 1830 she was reduced to a 50-gun ship. In November 1844 Capt. George B. Martin commissioned her for service on the West Indies and North American station. She was back in Devonport by 1848. In 1860 she was employed by the Coast Guard service at Milford Haven.
She was renamed HMS Eaglet in 1918, when she was the Royal Naval Reserve training centre for North West England. A fire destroyed Eagle in 1926.