| Honorific Prefix: | Sir |
| Honorific Suffix: | KCVO |
| Birth Date: | 1900 1, df=y |
| Education: | Rugby School |
| Alma Mater: | Balliol College, Oxford |
| Spouse: | Marjorie Laura Pollock |
| Children: | 1 |
| Known For: | Private Solicitor to both King George VI and Queen Elizabeth II |
| Relatives: | Sir Matthew Farrer (son) Ernest Pollock, 1st Viscount Hanworth (father-in-law) |
Sir Walter Leslie Farrer KCVO (30 January 1900 – 6 March 1984) was a British solicitor. He was Private Solicitor to both King George VI and Queen Elizabeth II. He married Marjorie Laura Pollock, daughter of Ernest Pollock, 1st Viscount Hanworth. They had one son, Sir Matthew Farrer (also a partner at Farrer & Co), and one daughter.
He was educated at Rugby School and Balliol College, Oxford.
He wrote a letter to the Times, about Ernest Gellner.[1]