| Honorific Prefix: | The Right Honourable |
| The Earl of Leven | |
| Term Start: | 1741 |
| Term End: | 1753 |
| Predecessor: | The Earl of Hyndford |
| Successor: | The Earl of Hopetoun |
| Birth Name: | Alexander Leslie |
| Parents: | David Leslie, 3rd Earl of Leven |
| Spouse: | |
Alexander Leslie, 5th Earl of Leven (28 May 1695 – 2 September 1754)[1] was a Scottish aristocrat.
He was the son of David Leslie, 3rd Earl of Leven (1660–1728) and Lady Anne Wemyss (1675–1702).[2]
His mother was the eldest daughter of James Wemyss, Lord Burntisland and Lady Margaret Wemyss, suo jure Countess of Wemyss (the only daughter of David Wemyss, 2nd Earl of Wemyss).
Following the death of his nephew in 1729 (his elder brother predeceased their father in 1721), he inherited the earldoms of Leven and Melville, though he did not use the latter title.
Lord Leven served as a Lord of Session from 1734 to 1754; Grand Master of Scottish Freemasons 1741 to 1742; High Commissioner to the General Assembly of the Church of Scotland from 1741 to 1753; a Representative Peer for Scotland from 1747 to 1754; and a Lord of Police 1754.
On 23 February 1721, he married Mary Erskine, a daughter of Col. Hon. John Erskine of Carnock (third son of David Erskine, 2nd Lord Cardross) and Anna Dundas (daughter and co-heiress of William Dundas of Kincavel). Before her death in 1723, they had one child:[3]
After the death of his first wife in 1723, he married Elizabeth Monypenny, a daughter of Alexander Moneypenny of Pitmilly, on 13 March 1726.[5] They had four children:
Lord Leven and Melville died on 2 September 1754 and was succeeded in his titles by his eldest son, David.