Sir Robert Alexander Osborne Dalyell of the Binns, 8th Baronet DL JP (1821 – 1886) was a British diplomat, and one of the Dalyell baronets.
He succeeded to the Baronetecy and inherited the House of the Binns on the death of his brother William Cunningham Dalyell.
In his diplomatic career, he was acting consul-general in Bucharest 1856–7, and in Belgrade 1857–9.
He was consul in Erzerum, Turkey 1859–62, in Iași, Romania 1862–1865,[1] and in Ruse, Bulgaria 1865–74.
He is buried in Abercorn churchyard in West Lothian.