Oswald Harker | |
|---|---|
 | |
| Born | 1886 |
| Died | 1968 (aged 81–82) |
| Nationality | British |
| Other names | Jasper Harker |
| Occupation | Intelligence officer |
| Espionage activity | |
| Allegiance | United Kingdom  |
| Service branch | MI5 |
| Rank | Director General of MI5 |
Brigadier Oswald Allen Harker CBE (1886–1968), known as Jasper Harker, was Acting Director General of MI5 from 1940 to 1941.