HMS Cornwall was a 74-gun third-rate Vengeur-class ship of the line built for the Royal Navy in the 1810s.

She spent most of her service in reserve and was converted into a reformatory and a school ship in her later years.

[2] After she was razeed to a 50-gun fourth rate ship in 1830, her armament became twenty-eight 32-pounders on the lower gundeck, sixteen lighter 32-pounders on the upper deck and four more 32-pounders on the forecastle.

[3] Cornwall was the third ship in the Royal Navy to be named after the eponymous county.

On 18 June 1868 she exchanged names with Wellesley and moved to the Tyne to serve as a school ship.