James Mure-Campbell, 5th Earl of Loudoun (11 February 1726 – 28 April 1786) was a Scottish aristocrat and soldier. He assumed the name of Mure on succeeding to the estate of his grandmother, the Countess of Glasgow, heiress of the family of Mure of Rowallan. He married Flora Macleod, daughter of John Macleod of Raasay; their only child Flora Mure-Campbell succeeded to the title as 6th Countess of Loudoun. He served in the army, reaching the rank of Major-General.