The Alexander Baronetcy, of Menstre in the County of Clackmannan, was created in the Baronetage of Nova Scotia on 12 July 1625.
The Alexander, later Cable-Alexander Baronetcy, of the City of Dublin, was created in the Baronetage of the United Kingdom on 11 December 1809.
The Alexander, later Hagart-Alexander Baronetcy, of Ballochmyle in the County of Ayr, was created in the Baronetage of the United Kingdom on 22 January 1886.
The Alexander Baronetcy, of Edgehill, Stamford, in Connecticut in the United States of America, was created in the Baronetage of the United Kingdom on 2 July 1921 for the British-born Canadian businessman Douglas Alexander.
As of 2019, the title is held by his great-grandson, the fourth Baronet, who succeeded his father in that year.