Captain John Stockham (24 July 1765 – 6 February 1814) was an officer in the Royal Navy during the Napoleonic Wars, whose career is now obscured to the point that very little of his life is known up until 1805, when he was suddenly and unexpectedly called upon to command the ship of the line HMS Thunderer at the Battle of Trafalgar.

Nonetheless, Stockham and Thunderer performed admirably, engaging the Spanish flagship Principe de Asturias and the French Neptune.

Thunderer suffered 16 casualties but remained largely intact, which enabled her to aid more battered ships during the storm which followed.

Following the action, Stockham was granted a gold medal and sword from the Lloyd's Patriotic Fund, and was promoted to Post Captain on Christmas Day of that year.

He was buried in a family plot in St Sidwell's Church, but German bombing during the Blitz destroyed his grave.