DATE | NAME/MISSION |
| October 7, 1924 | LEGATION OPENED – Listed as Irish Free State |
| October 7, 1924 | Timothy A. Smiddy, E.E. and M.P. |
| March 14, 1929 | Michael MacWhite, E.E. and M.P. |
| January 1938 List | LISTED AS IRELAND |
| March 2, 1938 | Robert Brennan, Charge d'Affaires a.i. |
| September 8, 1938 | Robert Brennan, Appt. E.E. and M.P. |
| October 11, 1938 | E.E. and M.P. |
| June 10, 1947 | Sean Nunan, Appt. E.E. and M.P. |
| June 20, 1947 | E.E. and M.P. |
| April 17, 1950 | LEGATION RAISED TO EMBASSY |
| April 6, 1950 | John Joseph Hearne, Appt. Amb. E. and P. |
| April 17, 1950 | Amb. E. and P. |
| September 9, 1960 | Thomas J. Kiernan, Appt. Amb. E. and P. |
| September 28, 1960 | Amb. E. and P. |
| April 21, 1964 | William P. Fay, Appt. Amb. E. and P. |
| May 15, 1964 | Amb. E. and P. |
| February 27, 1970 | William Warnock, Appt. Amb. E. and P. |
| March 17, 1970 | Amb. E. and P. |
| August 24, 1973 | Dr. Sean OhEIDEAIN, Charge d'Affaires a.i. |
| October 3, 1973 | John Gerald Molloy, Appt. Amb. E. and P. |
| November 9, 1973 | Amb. E. and P. |
| September 9, 1978 | Sean Donlon, Appt. Amb. E. and P. |
| October 2, 1978 | Amb. E. and P. |
| October 24, 1981 | John Burke, Counselor, Charge d'Affaires ad interim |
| November 24, 1981 | Tadhg F. O'Sullivan, Appt. Amb. E. and P. |
| December 8, 1981 | Amb. E. and P. |
| August 23, 1985 | Padraic N. MacKernan, Appt. |
| September 17, 1985 | Amb. E. and P. |
| August 15, 1991 | Dermot A. Gallagher, Appt. |
| September 5, 1991 | Amb. E. and P. |
| September 5, 1997 | Sean O'Huiginn, Appt. |
| September 8, 1997 | Amb. E. and P. |
| September 5, 2002 | Noel Fahey, Appt. |
| September 25, 2002 | Amb. E. and P. |
| August 14, 2007 | Michael Collins. Appt. |
| September 18, 2007 | Amb. E. and P. |
Special Terms* [Amb.] E.E. and M.P.= Envoy Extraordinary and Minister Plenipotentiary [Charge d'Affaires] a.i.= ad interim Amb. E. & P. = Ambassador Extraordinary and Plenipotentiary | |
