Adam Drummond (31 January 1713 – 17 June 1786), 11th of Lennoch and 4th of Megginch in Perthshire, was a Scottish merchant, banker and Member of Parliament.
Drummond was the eldest son of John Drummond. He was educated at Leiden University, and after briefly studying law joined the army in 1739, being commissioned as lieutenant in the 47th Regiment of Foot in 1741 and promoted to captain in 1745. In this capacity he served against the Jacobite Rebellion at the Battle of Prestonpans, where he was captured. He later served in North America, but was put on half-pay in 1753 and retired from the army in 1756 and set up as a merchant.
On 4 February 1755, Drummond married Catherine Ashe, widow of William Ashe, MP and daughter of the 4th Duke of Bolton. The Bolton family controlled a number of pocket boroughs, and at the next general election (in 1761) Drummond entered Parliament as member for Lymington. Although the Duke of Bolton went into opposition after the election, Drummond supported the government, and in 1764 was rewarded when in partnership with Sir Samuel Fludyer he was awarded the lucrative contract for victualling the British troops in North America. Later the same year, Drummond, Fludyer and Anthony Bacon secured a 30-year lease of all the coal on Cape Breton Island and in 1767 he acquired a large land grant in St John's Island (now Prince Edward Island). Further profitable contracts followed and, unlike his partner Fludyer, Drummond was able to retain or renew them as governments changed by remaining loyal to whichever administration was in power and helped by the influence of his noble brother-in-law.