John Abercromby, 5th Baron Abercromby (15 January 1841 – 7 October 1924) was a Scottish soldier and archaeologist. The second son of the George Abercromby, 3rd Baron Abercromby and Louisa Penuel Forbes, on his death in 1924 he had no male issue and as a result the Barony of Abercromby became extinct.