Diplomats — reference index 7
- James C. H. Shen — China
- James F. Byrnes
- James G. Blaine
- James K. Polk
- James Madison
- James Monroe
- James Plimsoll — Australia
- James Roscoe — United Kingdom
- Jamsheed K. A. Marker — Pakistan
- Jan Eliasson — Sweden
- Jan Ruiter Jordaan — South Africa
- Javier Rupérez — Spain
- Javlon Vakhabov — Uzbekistan
- Jean Jules Jusserand — France
- Jean-Baptiste de Ternant — France
- Jean-Baptiste-Gaspard Roux de Rochelle — France
- Jean-David Levitte — France
- Jean-Guillaume Hyde de Neuville — France
- Jehangir Karamat — Pakistan
- Jens Hanefeld — Germany
- Jeremiah S. Black
- Jeremy Brown Shearer — South Africa
- Jerónimo Remorino — Argentina
- Jesús Federico Reyes-Heroles González-Garza — Mexico
- Jesús Silva-Herzog Flores — Mexico
- Jimmy Carter
- Jirō Yano — Japan
- Joaquim Francisco de Assis do Brasil — Brazil
- Joaquim Luís Cardoso Palmeiro — Brazil
- Joaquim Maria Nascentes de Azambuja — Brazil
- Joaquim Nabuco — Brazil
- Joaquín Cervino Santías — Spain
- Joaquín D. Casasús — Mexico
- Joaquín de Anduaga y Cuenca — Spain
- Joaquín José de Osma — Peru
- Joaquín María del Castillo y Lanzas — Mexico
- Joaquín Velázquez de León — Mexico
- João Augusto de Araújo Castro — Brazil
- João Batista Pinheiro — Brazil
- João Carlos Muniz — Brazil
- Joe Biden
- Joe Hockey — Australia
- Johan Albert Kantzow — Sweden
- Johan Anton Wolff Grip — Sweden
- Johan Samuel Frederick Botha — South Africa
- Johann Heinrich von Bernstorff — Germany
- Johannes Albertus Hermanus “Herb” Beukes — South Africa
- John Adams
- John Bassett Moore
- John C. Calhoun
- John de Chastelain — Canada
- John Edward Holloway — South Africa
- John F. Kennedy
- John Fiennes Twisleton Crampton — United Kingdom
- John Forsyth
- John Foster Dulles
- John Freeman — United Kingdom
- John Hay
- John Jay
- John Kerry
- John M. Clayton
- John Marshall
- John McCarthy — Australia
- John Philip Morier — United Kingdom
- John Quincy Adams
- John Savile-Lumley — United Kingdom
- John Sherman
- John Tyler
- John W. Foster
- Jonas Hafström — Sweden
- Jorge Antonio Aja Espil — Argentina
- Jorge Argüello — Argentina
- Jorge Bolaños Suárez — Cuba
- Jorge de Carvalho e Silva — Brazil
- Jorge de Sá Almeida — Brazil
- Jorge Dezcallar de Mazarredo — Spain
- Jorge Espinoza de los Reyes Sánchez — Mexico
- Jorge Mario Montaño Martínez — Mexico
- Jorge Prado — Peru
- Joseph Fauchet — France
- Joseph Hume Burnley — United Kingdom
- Joseph Stalin
- Joseph-Alexandre-Jacques Durant de Mareuil — France
- José Anastasio Torrens — Mexico
- José Antonio Arbesú Fraga — Cuba
- José Antonio García y García — Peru
- José Arce Larco — Peru
- José Artur Denot Medeiros — Brazil
- José Augusto Ferreira da Costa — Brazil
- José Brunetti y Gayoso, Duke of Arcos — Spain
- José Carlos Tracy — Peru
- José de Araújo Ribeiro — Brazil
- José de Jáudenes y Nebot — Spain
- José Felipe Sagrario — Spain
- José Félix de Lequerica — Spain
- José Francisco de Paula Cavalcante de Albuquerque — Brazil
- José Gurgel do Amaral Valente — Brazil
- José Ignacio de Viar — Spain
- José Juan de Olloqui y Labastida — Mexico
- José Lladó Fernández-Urrutia — Spain