| Honorific Prefix: | Sir |
| Stuart Auchincloss Coats | |
| Honorific Suffix: | Bt KC*PO KC*SG |
| Office: | Member of Parliament for East Surrey |
| Term Start: | 1918 |
| Term End: | 1922 |
| Predecessor: | New constituency |
| Successor: | James Galbraith |
| Office1: | Member of Parliament for Wimbledon |
| Term Start1: | 1916 |
| Term End1: | 1918 |
| Predecessor1: | Henry Chaplin |
| Successor1: | Sir Joseph Hood |
| Birth Name: | Stuart Auchincloss Coats |
| Birth Date: | 20 March 1868 |
| Party: | Conservative |
| Parents: | Sir James Coats, 1st Baronet Sarah Ann Auchincloss Coats |
| Children: | 3 |
| Relatives: | James C. Auchincloss (cousin) |
Sir Stuart Auchincloss Coats, 2nd Baronet (20 March 1868 – 15 July 1959) was a British politician and Member of Parliament for Wimbledon from 1916 to 1918 and then East Surrey from 1918 to 1922.
Stuart was born on 20 March 1868. He was the son of Sarah Ann (née Auchincloss) Coats (1838–1887) and Sir James Coats, 1st Baronet (1834–1913). He succeeded his father to the baronetcy in 1913. His brother Alfred M. Coats remained in the United States.
He unsuccessfully contested the Morpeth constituency as a Liberal Unionist in the 1906 general election and was also an unsuccessful candidate for Deptford in the January and December general elections of 1910. He was elected Conservative Member of Parliament for Wimbledon at a by-election in April 1916 and then for East Surrey in December 1918, retaining his seat until October 1922.
He was also a Private Chamberlain of Sword and Cape to Popes Pius X, Benedict XV, Pius XI and Pius XII.
Sir Stuart was married to Jane Muir Greenlees, the daughter of Thomas Greenlees Jr. of Paisley, Renfrewshire, at Castlehead, Paisley, in 1891.[1] Together, they were the parents of:
In 1920, his wife was painted by Philip Alexius de László.[5] [6] In 1936, he sold Ballathie House, his family's seat in Perthshire, Scotland, to Colonel Stephen Hardie, a founder of the British Oxygen Company.
Sir Stuart died on 15 July 1959. He was succeeded by his son Sir James Stuart Coats, 3rd Baronet.[7]
Through his daughter Margaret, he was the grandfather of Hon. Ardyne Knollys (b. 1929), and David Knollys, 3rd Viscount Knollys (b. 1931).[7] Through his eldest son, he was the grandfather of Sir Alastair Coats, 4th Baronet (1921–2015).[8]