Captain Archibald Kennedy, 11th Earl of Cassilis (1720 – 30 December 1794) was a Scottish peer who lived in the English colony of New York which became part of the United States.

Having joined the Royal Navy, Kennedy passed his exam for the rank of lieutenant on 11 December 1744 and was promoted five days later.

At the same time as his promotion, he was given command of the 18-gun sloop HMS Halifax, but his ship was captured by the French on 14 August of the same year.

In November, still commanding Coventry, he was appointed Commander-in-Chief, North American Station, as the senior captain present.

[5] In 1757, at the end of the Seven Years' War, Kennedy was promoted to Post-Captain and given command of all Royal Navy ships stationed at New York, part of a greater effort to generate more American revenues by keeping smuggling in check.

[5][2] Through his son Robert, he was a grandfather of Sophia Eliza Kennedy, who married John Levett of Wychnor Park and Packington Hall, Staffordshire.

(1838–1916), who became Commander-in-Chief, The Nore,[11] and Gilbert George Kennedy (1844–1909) who played for the Scottish XI in the second international football match against England.