Principal Officers and Chiefs of Mission, by year: 1915

Note: Career Foreign Service appointees are asterisked.

• Willard, Joseph Edward (1865-1924)
  • Envoy Extraordinary and Minister Plenipotentiary, Spain (1913)
  • Ambassador Extraordinary and Plenipotentiary, Spain (1913-1921)
• Adee, Alvey Augustus (1842-1924)
  • Third Assistant Secretary of State (1882-1886)
  • Second Assistant Secretary of State (1886-1924)
  • Secretary of State ad interim (1898)
  • Assistant Secretary of State (1924)
• Arnold, Olney (1861-1916)
  • Agent/Consul General, Egypt (1913-1916)
• *Bailly-Blanchard, Arthur (1855-1925)
  • Envoy Extraordinary and Minister Plenipotentiary, Haiti (1914-1921)
• Birch, Thomas Howard (1875-1929)
  • Envoy Extraordinary and Minister Plenipotentiary, Portugal (1913-1922)
• Bryan, William Jennings (1860-1925)
  • Secretary of State (1913-1915)
• Buckner, George Washington (1855-?)
  • Minister Resident/Consul General, Liberia (1913-1915)
• Curtis, James L. (1870-1917)
  • Minister Resident/Consul General, Liberia (1915-1917)
• *Dillery, Carl Edward (1930-)
  • Ambassador Extraordinary and Plenipotentiary, Kiribati (1884-1987)
  • Ambassador Extraordinary and Plenipotentiary, Fiji (1984-1987)
  • Ambassador Extraordinary and Plenipotentiary, Tonga (1984-1987)
  • Ambassador Extraordinary and Plenipotentiary, Tuvalu (1984-1987)
• Egan, Maurice Francis (1852-1924)
  • Envoy Extraordinary and Minister Plenipotentiary, Denmark (1907-1917)
• Ewing, John (1857-1923)
  • Envoy Extraordinary and Minister Plenipotentiary, Honduras (1913-1918)
• Droppers, Garrett (1860-1927)
  • Envoy Extraordinary and Minister Plenipotentiary, Montenegro (1914)
  • Envoy Extraordinary and Minister Plenipotentiary, Greece (1914-1920)
• *Fletcher, Henry Prather (1873-1959)
  • Envoy Extraordinary and Minister Plenipotentiary, Chile (1909-1910)
  • Ambassador Extraordinary and Plenipotentiary, Chile (1914-1916)
  • Ambassador Extraordinary and Plenipotentiary, Mexico (1916-1919)
  • Under Secretary of State (1921-1922)
  • Ambassador Extraordinary and Plenipotentiary, Belgium (1922-1924)
  • Envoy Extraordinary and Minister Plenipotentiary, Luxembourg (1923-1924)
  • Ambassador Extraordinary and Plenipotentiary, Italy (1924-1929)
• Guthrie, George Wilkins (1848-1917)
  • Ambassador Extraordinary and Plenipotentiary, Japan (1913-1917)
• Hartman, Charles Sampson (1861-1929)
  • Envoy Extraordinary and Minister Plenipotentiary, Ecuador (1913-1922)
• Gonzales, William Elliott (1866-1937)
  • Envoy Extraordinary and Minister Plenipotentiary, Cuba (1913-1919)
  • Ambassador Extraordinary and Plenipotentiary, Peru (1919-1921)
• Hornibrook, William Harrison (1884-1946)
  • Envoy Extraordinary and Minister Plenipotentiary, Thailand (1915-1916)
  • Envoy Extraordinary and Minister Plenipotentiary, Iran (1933-1936)
  • Envoy Extraordinary and Minister Plenipotentiary, Afghanistan (1935-1936)
  • Envoy Extraordinary and Minister Plenipotentiary, Costa Rica (1937-1941)
• Jefferson, Benjamin Lafayette (1871-1950)
  • Envoy Extraordinary and Minister Plenipotentiary, Nicaragua (1913-1921)
• Jeffery, Robert Emmett (1875-1935)
  • Envoy Extraordinary and Minister Plenipotentiary, Uruguay (1915-1921)
• Marye, George T. (1857-1933)
  • Ambassador Extraordinary and Plenipotentiary, Russia (1914-1916)
• McGoodwin, Preston Buford (1880-1945)
  • Envoy Extraordinary and Minister Plenipotentiary, Venezuela (1913-1921)
• McMillin, Benton (1845-1933)
  • Envoy Extraordinary and Minister Plenipotentiary, Peru (1913-1919)
  • Envoy Extraordinary and Minister Plenipotentiary, Guatemala (1919-1920)
• Lansing, Robert (1864-1928)
  • Counselor (1914-1915)
  • Secretary of State ad interim (1915)
  • Secretary of State (1915-1920)
• Leavell, William Hayne (1850-1930)
  • Envoy Extraordinary and Minister Plenipotentiary, Guatemala (1913-1918)
• Long, Boaz Walton (1876-1962)
  • Envoy Extraordinary and Minister Plenipotentiary, El Salvador (1914-1917)
  • Envoy Extraordinary and Minister Plenipotentiary, Cuba (1919-1921)
  • Envoy Extraordinary and Minister Plenipotentiary, Nicaragua (1936-1938)
  • Envoy Extraordinary and Minister Plenipotentiary, Ecuador (1938)
  • Ambassador Extraordinary and Plenipotentiary, Ecuador (1942-1943)
  • Ambassador Extraordinary and Plenipotentiary, Guatemala (1943-1945)
• Mooney, Daniel Francis (1865-1930)
  • Envoy Extraordinary and Minister Plenipotentiary, Paraguay (1914-1921)
• *Morgan, Edwin Vernon (1865-1934)
  • Envoy Extraordinary and Minister Plenipotentiary, Korea (1905)
  • Envoy Extraordinary and Minister Plenipotentiary, Cuba (1905-1910)
  • Envoy Extraordinary and Minister Plenipotentiary, Paraguay (1909-1911)
  • Envoy Extraordinary and Minister Plenipotentiary, Uruguay (1909-1911)
  • Envoy Extraordinary and Minister Plenipotentiary, Portugal (1911-1912)
  • Ambassador Extraordinary and Plenipotentiary, Brazil (1912-1933)
• Morgenthau, Henry (1856-1946)
  • Ambassador Extraordinary and Plenipotentiary, Turkey (1913-1916)
  • Ambassador Extraordinary and Plenipotentiary, Mexico (Not commissioned; nomination not confirmed by the Senate.)
• Morris, Ira Nelson (1875-1942)
  • Envoy Extraordinary and Minister Plenipotentiary, Sweden (1914-1923)
• O'Rear, John Davis (1868-1918)
  • Envoy Extraordinary and Minister Plenipotentiary, Bolivia (1913-1918)
• Osborne, John Eugene (1858-1943)
  • Assistant Secretary of State (1913-1916)
• Page, Thomas Nelson (1853-1922)
  • Ambassador Extraordinary and Plenipotentiary, Italy (1913-1919)
• Page, Walter Hines (1855-1918)
  • Ambassador Extraordinary and Plenipotentiary, United Kingdom (1913-1918)
• Penfield, Frederic Courtland (1855-1922)
  • Agent/Consul General, Egypt (1893-1897)
  • Ambassador Extraordinary and Plenipotentiary, Austria (1913-1917)
• *Phillips, William (1878-1968)
  • Envoy Extraordinary and Minister Plenipotentiary, Luxembourg (1920-1922)
  • Envoy Extraordinary and Minister Plenipotentiary, Netherlands (1920-1922)
  • Ambassador Extraordinary and Plenipotentiary, Belgium (1924-1927)
  • Envoy Extraordinary and Minister Plenipotentiary, Luxembourg (1924-1927)
  • Envoy Extraordinary and Minister Plenipotentiary, Canada (1927-1929)
  • Ambassador Extraordinary and Plenipotentiary, Italy (1936-1941)
  • Third Assistant Secretary of State (1909)
  • Third Assistant Secretary of State (1914-1917)
  • Under Secretary of State (1922-1924)
  • Under Secretary of State (1933-1936)
• Polk, Frank Lyon (1871-1943)
  • Counselor (1915-1919)
  • Under Secretary of State (1919-1920)
  • Secretary of State ad interim (1920)
• Price, William Jennings (1873-1952)
  • Envoy Extraordinary and Minister Plenipotentiary, Panama (1913-1921)
• Reinsch, Paul Samuel (1869-1923)
  • Envoy Extraordinary and Minister Plenipotentiary, China (1913-1919)
• Russell, William Worthington (1859-1944)
  • Envoy Extraordinary and Minister Plenipotentiary, Colombia (1904-1905)
  • Envoy Extraordinary and Minister Plenipotentiary, Venezuela (1905)
  • Minister Resident/Consul General, Dominican Republic (1910)
  • Envoy Extraordinary and Minister Plenipotentiary, Dominican Republic (1911-1913)
  • Envoy Extraordinary and Minister Plenipotentiary, Dominican Republic (1915-1925)
  • Envoy Extraordinary and Minister Plenipotentiary, Thailand (1925-1927)
• Schmedemann, Albert George (1864-1946)
  • Envoy Extraordinary and Minister Plenipotentiary, Norway (1913-1921)
• Sharp, William Graves (1859-1922)
  • Ambassador Extraordinary and Plenipotentiary, France (1914-1919)
• Stimson, Frederic Jesup (1855-1943)
  • Ambassador Extraordinary and Plenipotentiary, Argentina (1914-1921)
• Stovall, Pleasant Alexander (1857-1935)
  • Envoy Extraordinary and Minister Plenipotentiary, Switzerland (1913-1919)
• Sullivan, James Mark (1873-1935)
  • Envoy Extraordinary and Minister Plenipotentiary, Dominican Republic (1913-1915)
• van Dyke, Henry (1852-1933)
  • Envoy Extraordinary and Minister Plenipotentiary, Luxembourg (1913-1917)
  • Envoy Extraordinary and Minister Plenipotentiary, Netherlands (1913-1917)
• Vopicka, Charles Joseph (1857-1935)
  • Envoy Extraordinary and Minister Plenipotentiary, Bulgaria (1913)
  • Envoy Extraordinary and Minister Plenipotentiary, Romania (1913-1920)
  • Envoy Extraordinary and Minister Plenipotentiary, Yugoslavia (1913)
• Thomson, Thaddeus Austin (1853-1927)
  • Envoy Extraordinary and Minister Plenipotentiary, Colombia (1913-1916)