HMS Windsor Castle was a triple-decker, 102-gun first-rate Royal Navy ship of the line.

204 feet long, and of 4971 tons displacement, she had a crew of 930, but almost immediately entered the first-class steam reserve – The Times reported on 13 September 1860 reported her as among the "ships and gunboats in the first-class steam reserve which could be got ready for the pennant at a short notice".

Other of her tenders included HMS Gorgon, Plucky and Sabrina (around 1877) and HMS Bonetta, Bulldog, Cuckoo, Hecate, Plucky, Sabrina, Snap (around 1890), and Undaunted (from 1901).

In June 1902 she was at Devonport, when Rear-Admiral Assheton Curzon-Howe hoisted his flag on board as second in command of the Channel Squadron.

5 Basin of the Royal Dockyard to enable the gunnery school to move ashore into the Naval Barracks, paid off on 4 November that year and sold to Cox on 24 June 1908 for breaking up at Falmouth.