Lyon Playfair, 1st Baron Playfair
| The Lord Playfair | |
|---|---|
| Postmaster General | |
| In office 18 November 1873 – 17 February 1874 | |
| Monarch | Queen Victoria | 
| Prime Minister | William Ewart Gladstone | 
| Preceded by | William Monsell | 
| Succeeded by | Lord John Manners | 
| Deputy Speaker of the House of Commons Chairman of Ways and Means | |
| In office 1880–1883 | |
| Monarch | Queen Victoria | 
| Preceded by | Henry Cecil Raikes | 
| Succeeded by | Sir Arthur Otway, Bt | 
| Vice-President of the Committee on Education | |
| In office 13 February 1886 – 20 July 1886 | |
| Monarch | Queen Victoria | 
| Prime Minister | William Ewart Gladstone | 
| Preceded by | Sir Henry Holland, Bt | 
| Succeeded by | Sir Henry Holland, Bt | 
| Personal details | |
| Born | 1 May 1818 Chunar, Bengal, British India | 
| Died | 29 May 1898 (aged 80) South Kensington, London | 
| Nationality | British | 
| Political party | Liberal | 
| Spouse(s) | Margaret Oakes (d. 1855) Jean Millington (d. 1877) Edith Russell (d. 1932) | 
| Relations | William Smoult Playfair (brother) Robert Lambert Playfair (brother) | 
| Alma mater | University of St Andrews University of Edinburgh | 
Lyon Playfair, 1st Baron Playfair GCB PC FRS (1 May 1818 – 29 May 1898) was a British scientist and Liberal politician who was Postmaster-General from 1873 to 1874.