| Head Of Post | Title | Career | Appointment Date | Presentation of credentials | Termination of mission |
| Massey, Hon. Vincent | EEMP | NC | 1926/11/25 | 1927/02/18 | 1930/07/23 |
| Wrong, Humphrey Hume | Chargé d'Affaires a.i. | C | 1930/07/24 | | 1931/06/23 |
| Herridge, Maj. the Hon. William Duncan | EEMP | NC | 1931/03/07 | 1931/06/23 | 1935/10/23 |
| Wrong, Humphrey Hume | Chargé d'Affaires a.i. | C | 1935/10/24 | | 1936/10/19 |
| Marler, Hon. Sir Herbert Meredith | EEMP | NC | 1936/08/14 | 1936/10/20 | 1939/09/10 |
| Christie, Loring Cheney | EEMP | C | 1939/09/15 | 1939/09/25 | 1941/04/08 |
| McCarthy, Hon. Leighton | EEMP | NC | 1941/02/24 | 1941/03/14 | 1943/01/12 |
| McCarthy, Hon. Leighton | AE&P | NC | 1943/01/12 | 1943/01/12 | 1944/12/31 |
| Pearson, Lester Bowles | AE&P | C | 1945/01/01 | 1945/01/22 | 1946/09/17 |
| Wrong, Humphrey Hume | AE&P | C | 1946/09/04 | 1946/11/08 | 1953/07/10 |
| Heeney, Arnold Danford Patrick | AE&P | C | 1953/05/27 | 1953/08/03 | 1957/05/09 |
| Robertson, Norman Alexander | AE&P | C | 1957/04/04 | 1957/05/17 | 1958/10/10 |
| Heeney, Arnold Danford Patrick | AE&P | C | 1959/01/21 | 1959/03/02 | 1962/04/25 |
| Ritchie, Charles Stewart Almon | AE&P | C | 1962/02/15 | 1962/05/25 | 1966/06/18 |
| Ritchie, Albert Edgar | AE&P | C | 1966/03/10 | 1966/07/22 | 1970/01/00 |
| Cadieux, Marcel | AE&P | C | 1969/10/23 | 1970/02/20 | 1975/06/15 |
| Warren, Jack Hamilton | AE&P | C | 1975/02/25 | 1975/07/14 | 1977/07/14 |
| Towe, Peter Milburn | AE&P | C | 1977/06/03 | 1977/07/29 | 1981/11/28 |
| Gotlieb, Allan Ezra | AE&P | C | 1981/10/29 | | |
| Burney, Derek Hudson | AE&P | C | 1988/09/30 | 1989/02/07 | 1993/01/23 |
| de Chastelain, John G.D. | AE&P | C | 1993/01/05 | | |
| Chrétien, Raymond A.J. | AE&P | C | 1994/01/01 | | |
| Phillips, Michael B. | CG | C | 1998/09/17 | | |
| Kergin, Michael F. | AE&P | C | 2000/06/26 | 2000/10/19 | 2005/03/01 |
| Butler, Kim Perry | CG | C | 2004/05/19 | | |
| Dudoit, Alain | CG | C | 2004/05/19 | | |
| Fine, Michael | CG | | 2004/05/19 | | |
| Parker, Jeffrey N. | CG | | 2004/05/19 | | |
| McKenna, Frank J. | AE&P | NC | 2005/01/13 | | 2006/03/13 |
| Wilson, Michael | AE&P | NC | 2006/02/16 | 2006/03/13 | 2009/10/19 |
| Doer, Gary | AE&P | NC | 2009/10/18 | 2009/10/23 | |
| MacNaughton, David | AE&P | NC | 2016/01/15 | 2016/03/02 | |
| Hillman, Kirsten | AE&P | C | 2020/03/24 | 2020/09/18 | |