| Honorific Prefix: | The Right Honourable |
| The Earl of Stair | |
| Honorific Suffix: | KT JP DL |
| Office: | Member of Parliament for Wigtownshire |
| Term Start: | 1841 |
| Term End: | 1856 |
| Predecessor: | James Blair |
| Successor: | Sir Andrew Agnew, Bt |
| Birth Name: | John Aymer Dalrymple |
| Parents: | North Dalrymple, 9th Earl of Stair Margaret Penny |
| Children: | 8 |
| Relations: | John Dalrymple, 12th Earl of Stair (grandson) |
John Hamilton Dalrymple, 10th Earl of Stair, KT JP DL (1 April 1819 – 3 December 1903), styled Viscount Dalrymple from 1853 until 1864, was a Scottish peer and politician, who served as Governor of the Bank of Scotland for thirty-three years.[1]
He was the eldest son of North Dalrymple, 9th Earl of Stair, and his first wife, Margaret Penny (d. 1828). His sister, Lady Margaret Dalrymple, married advocate and amateur botanist Allan Alexander Maconochie. After his mother's death in 1828, his father remarried to Martha Willett Dalrymple, daughter of Col. George Dalrymple.
His paternal grandparents were Sir John Dalrymple, 4th Baronet and, his cousin, Elizabeth Hamilton MacGill (daughter and heiress of Thomas Hamilton of Fala, who himself had inherited Oxenfoord Castle, property of the Viscounts of Oxfuird).[2] His maternal grandfather was James Penny of Arrad, Lancashire.[3]
He represented Wigtownshire in Parliament from 1841 to 1856. He became Earl of Stair on the death of his father in 1864, and served as Lord Lieutenant of Ayrshire from 1870 to 1897. From 1870 to 1903 he was the Governor of the Bank of Scotland. After it was proposed in 1877, he successfully opposed the southward extension to Drummore of the Portpatrick and Wigtownshire Joint Railway. He also served as Lord High Commissioner to the Church of Scotland from 1869 to 1871.[4] Between 1896 and 1902 he served as President of the Edinburgh conservation body the Cockburn Association.[5]
In 1846, he married his cousin, Louisa Jane Henrietta Emily de Franquetot, the Edinburgh-born eldest daughter of Augustin-Gustave de Franquetot, 3rd Duke of Coigny and Henrietta Dundas Dalrymple-Hamilton (a daughter of Sir Hew Dalrymple-Hamilton, 4th Baronet). Together, they had eight children, including:[3]
Lady Stair died on 30 June 1896. Lord Stair died on 3 December 1903.[3]
Through his son North, he was a grandfather of Colonel Sir North Dalrymple-Hamilton and Admiral Sir Frederick Dalrymple-Hamilton.[3]