Sir Andrew Buchanan, 1st Baronet

Sir Andrew Buchanan, 1st Baronet, GCB, PC, DL (7 May 1807 – 12 November 1882) was a British diplomat.

Family Buchanan was the only son of James Buchanan of Blairvadach, Ardinconnal, Dunbartonshire, and Janet, the eldest daughter of James Sinclair, 12th Earl of Caithness.

On 4 April 1839, he married Frances Katharine, the daughter of the Very Rev Edward Mellish, dean of Hereford. She died 4 December 1854. The children from this marriage were: Louisa Buchanan (d. 19 Jan 1923) Frances Matilda Buchanan (d. 13 Dec 1908) Sir James Buchanan, 2nd Baronet (7 Aug 1840 – 16 Oct 1901) Sir Eric Alexander Buchanan, 3rd Baronet (19 Aug 1848 – 29 Jul 1928) Andrew Archibald Buchanan (16 Jan 1850 – 5 Oct 1932) Rt. Hon. Sir George William Buchanan (25 Nov 1854 – 20 Dec 1924)

Secondly, on 27 May 1857, Buchanan married Hon. Georgiana Elizabeth Stuart, the third daughter of Robert Walter Stuart, 11th Lord Blantyre.

In 1853, he was named envoy extraordinary to the king of Denmark, and he acted as her majesty's representative at the conference of Copenhagen in November 1855 for the definite arrangement of the Sound Dues question.

He had been appointed a Commander of the Order of the Bath (C.B.) o 23 May 1857, He was transferred to Madrid 31 March 1858 and promoted to Knight Commander (K.C.B.) 25 February 1860 and then to The Hague on 11 December 1860.

He became ambassador extraordinary and plenipotentiary to the King of Prussia 28 October 1862 for which he was sworn to the Privy Council. He served on the Privy Council on 3 February 1863. He was sent as Ambassador Extraordinary to the Russian Empire on 15 September 1864, raised to Knight Grand Cross (G.C.B.) on 6 July 1866 and made ambassador to Austria-Hungary from 16 October 1871 to 16 February 1878, when he retired on a pension. and died at Craigend Castle, in Milngavie, near Glasgow.