Chiefs of Mission for Canada
- William Phillips (1927-1929)
- Hanford MacNider (1930-1932)
- Warren Delano Robbins (1933-1935)
- Norman Armour (1935-1938)
- Daniel Calhoun Roper (1939-1939)
- James Henry Roberts Cromwell (1940-1940)
- Jay Pierrepont Moffat (1940-1943)
- Ray Atherton (1943-)
- Ray Atherton (1943-1948)
- Laurence Adolph Steinhardt (1948-1950)
- Stanley Woodward (1950-1953)
- R. Douglas Stuart (1953-1956)
- Livingston Tallmadge Merchant (1956-1958)
- Richard Bowditch Wigglesworth (1958-1960)
- Livingston Tallmadge Merchant (1961-1962)
- William Walton Butterworth (1962-1968)
- Harold Francis Linder (1968-1969)
- Adolph William Schmidt (1969-1974)
- William James Porter (1974-1975)
- Thomas Ostrom Enders (1975-1979)
- Kenneth Merwin Curtis (1979-1981)
- Paul Heron Robinson (1981-1985)
- Thomas Michael Tolliver Niles (1985-1989)
- Edward Noonan Ney (1989-1992)
- Peter Barry Teeley (1992-1993)
- James J. Blanchard (1993-1996)
- James Donald Walsh (1996-1997)
- Gordon D. Giffen (1997-2001)
- Argeo Paul Cellucci (2001-2005)
- David Horton Wilkins (2005-2009)
- David C. Jacobson (2009-)
- Nathan William MacChesney (-)
- James G. Weston (-)