Sir Alexander Abercromby of Birkenbog, 1st Baronet (c. 1603 - December 1684) was a Scottish politician.
He was the oldest son of Alexander Abercromby of Birkenbog and his wife Elizabeth Bethune, daughter of David Bethune.[1] On 20 February 1636, he was created a Baronet, of Birkenbog, in the County of Banff.[2] Abercromby entered the Parliament of Scotland in 1640, sitting for Banffshire until the following year.[3] He represented the constituency also in 1643 and after a break of three years, he was returned for it in 1646, a seat he held for the next two years.[3] In 1661, he was again successful for Banffshire until 1663.[3] Abercromby was a Covenanter and in 1645 took part at the Battle of Auldearn under command of John Hurry.[4]
He married firstly Jane Urquhart, daughter of Sir Thomas Urquhart, and had by her a son and three daughters.[5] After her death, Abercromby remarried Jane Sutherland.[5] On 22 August 1668 he married thirdly Elizabeth Baird, daughter of Sir James Baird.[5] Abercromby had another daughter by his second wife and three sons and a daughter by his third wife.[5] He was succeeded in the baronetcy by his second and oldest surviving son James.[4] His third son Alexander was also a Member of Parliament and ancestor of the Barons Abercromby.[6]