Rear-Admiral Sir Thomas Hardy (13 September 1666 – 16 August 1732) was a Royal Navy officer of the late 17th and early 18th centuries. Having joined the navy sometime before 1688, Hardy became a follower of Captain George Churchill, to whom he served as first lieutenant during the Battle of Barfleur in 1692. Promoted to captain in 1693, Hardy served in the Channel Islands and off the coast of England until 1702 when he was given command of HMS Pembroke off the coast of Spain. Having fought at the Battle of Cádiz, he subsequently discovered the location of the Franco-Spanish fleet through the intervention of his chaplain, which resulted in the Battle of Vigo Bay. Hardy was knighted for his services.