| Office: | Member of Parliament for Argyllshire |
| Birth Date: | 1843 10, df=yes |
| Birth Name: | Donald Ninian Nicol |
| Party: | Unionist |
| Predecessor: | Donald Horne Macfarlane |
| Successor: | Sir John Ainsworth |
| Termstart: | 13 July 1895 |
| Termend: | 27 July 1903 |
| Birth Place: | Liverpool, Lancashire |
| Death Place: | Marylebone, London |
Donald Ninian Nicol JP DL (3 October 1843 – 27 July 1903)[1] was a British barrister and politician, who served as the Unionist Party MP for Argyllshire 1895 to 1903.[2]
Nicol was born in Liverpool, Lancashire, in October 1843 to a Scottish father & English mother. He was educated in Scotland, first at Merchiston Castle School, Edinburgh and at the University of Glasgow. In 1863 he entered Queen's College, Oxford, achieving a BA in 1867 and an MA in 1872. He was called to the bar at the Middle Temple in 1870 and worked on the Northern Circuit.[3]
Nicol stood for election as the Conservative candidate for Argyllshire in the 1895 general election, where he defeated the incumbent Liberal MP Donald Horne Macfarlane.[4] Nicol was re-elected at the 1900 general election with a 54% majority.
Nicol was married to Anne Millicent Bates (1849-1946), daughter of Sir Edward Bates, in 1874.[5] They had 4 children.
Nicol suffered from heart disease in later life, and he died in July 1903 after suffering a severe illness. He was succeeded as MP in a by-election by Liberal candidate Sir John Ainsworth who Nicol had previously defeated in 1900.