HMS Orion was a 91-gun Hood-class second rate of the Royal Navy.

[1] Orion was ordered as an 80-gun second rate on 30 March 1848 and laid down at Chatham Dockyard on 1 February 1850.

She was launched on 6 November 1854 and completed by 29 March 1855, with sea trials beginning on 24 February 1856 from Devonport.

[2] Orion was commanded from her commissioning until late 1857 by Captain John Elphinstone Erskine.

She took part in the Crimean War in 1855, serving in the Baltic Sea.