John Wynyard (died 20 February 1752) was an officer of the British Army.
Wynyard served with the 17th Regiment of Foot in the Jacobite rising of 1715, and on 10 July 1718 was promoted to the lieutenant-colonelcy of the regiment.
He was promoted to colonel of the newly raised 4th Regiment of Marines on 20 November 1739, and transferred to the colonelcy of the 17th Foot on 31 August 1742.
John Wynyard was for many years commander-in-chief at Gibraltar and Port Mahon.
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