Archibald Primrose, Lord Dalmeny (2 October 1809 – 23 January 1851), was a British Whig politician.
He was the eldest son and heir apparent of Archibald Primrose, 4th Earl of Rosebery (1783–1868), whom he predeceased, by his wife Harriett Bouverie.
Dalmeny was educated at Harrow School and Trinity College, Cambridge.
[1] Dalmeny was a supporter of the Reform Act 1832, and became a Member of Parliament for Stirling Burghs in the elections held that year after the passage of the bill.
From 25 April 1835 until the fall of Melbourne's Second Government in 1841, Dalmeny was a Civil Lord of the Admiralty.