| Office: | Minister of Internal Affairs |
| Office2: | Member of the Parliament of Rhodesia for Salisbury North |
| Termstart2: | 1924 |
| Termend2: | 1934 |
| Party: | United Rhodesia Party |
| Birth Date: | 16 August 1872 |
| Death Date: | 25 April 1940 (aged 67) |
| Term Start: | 13 November 1935 |
| Term End: | 3 October 1939 |
| Primeminister: | Godfrey Huggins |
| Successor: | Harry Davies |
| Predecessor: | Vernon Arthur Lewis |
| Honorific Prefix: | Sir |
| Honorific Suffix: | OBE |
Sir Percival Donald Leslie Fynn OBE (16 August 1872 – 25 April 1940) was a Rhodesian diplomat and politician.[1]
He was Treasurer in the First Cabinet of Southern Rhodesia.