| Sir Alan Jack Glyn | |
| Honorific-Suffix: | ERD |
| Office: | Member of Parliament for Clapham |
| Term Start: | 8 October 1959 |
| Term End: | 25 September 1964 |
| Predecessor: | Charles Gibson |
| Successor: | Margaret McKay |
| Office1: | Member of Parliament for Windsor |
| Predecessor1: | Charles Mott-Radclyffe |
| Successor1: | Constituency abolished |
| Term Start1: | 18 June 1970 |
| Term End1: | 8 February 1974 |
| Office2: | Member of Parliament for Windsor and Maidenhead |
| Predecessor2: | Constituency created |
| Successor2: | Michael Trend |
| Term Start2: | 28 February 1974 |
| Term End2: | 16 March 1992 |
| Birth Date: | 26 September 1918 |
| Birth Place: | London, United Kingdom |
| Death Place: | London, United Kingdom |
| Nationality: | British |
| Spouse: | Lady Rosula Windsor Clive (m. 1962) |
| Party: | Conservative |
| Children: | 2 |
| Alma Mater: | Westminster School Caius College, Cambridge |
| Profession: | Medical practitioner |
Sir Alan Jack Glyn (26 September 1918 – 5 May 1998) was a Conservative Party Member of Parliament.[1] He was educated at Westminster School and Gonville and Caius College, Cambridge, where he read medicine. He proceeded to St. Bartholomew's Hospital Medical School, qualifying as a medical practitioner. He served in the army until 1967.
He married, in 1962, Lady Rosula Windsor Clive, daughter of the 2nd Earl of Plymouth. The couple had two daughters.
He represented Clapham from 1959 to 1964, Windsor from 1970 to 1974, and Windsor and Maidenhead from 1974, to his retirement in 1992, where he was succeeded by Michael Trend.