Alexander Dundas Ross Cochrane-Wishart-Baillie, 1st Baron Lamington (24 November 1816 – 15 February 1890), better known as Alexander Baillie-Cochrane, was a British Conservative politician perhaps best known for his association with Young England in the early 1840s.

The son of Admiral of the Fleet Sir Thomas John Cochrane, he succeeded to the Baillie estate at Lamington in 1833.

He attended Cambridge University before entering parliament as a member for Bridport in 1841. He later sat for Lanarkshire, Honiton, and finally the Isle of Wight until 1880 when he was made a peer and went to the House of Lords as Baron Lamington, of Lamington in the County of Lanark.^[1]

In 1844 he married Annabella Mary Elizabeth Drummond,^[2] daughter of Andrew Drummond of Cadlands, Hampshire and a granddaughter of John Manners, 5th Duke of Rutland. Through the marriage of Annabella's sister Frederica, he was brother-in-law to the Earl of Scarborough.

They had four children. He was succeeded in his honours and lands by his only son, Charles Wallace Alexander Napier, second baron Lamington, who was appointed Governor of Queensland in 1895.