John G.A. Leishman (1857–1924)

State of Residence: Pennsylvania
  1. Envoy Extraordinary and Minister Plenipotentiary (Switzerland)
    Appointed: June 9, 1897
    Presentation of Credentials: August 9, 1897
    Termination of Mission: Presented recall on February 20, 1901
  2. Envoy Extraordinary and Minister Plenipotentiary (Turkey)
    Appointed: December 20, 1900
    Presentation of Credentials: March 29, 1901
    Termination of Mission: Promoted to Ambassador Extraordinary and Plenipotentiary October 5, 1906
  3. Ambassador Extraordinary and Plenipotentiary (Turkey)
    Appointed: June 18, 1906
    Presentation of Credentials: October 5, 1906
    Termination of Mission: Presented recall on June 10, 1909
    • Presented new credentials on May 17, 1909, after change of ruler.
  4. Ambassador Extraordinary and Plenipotentiary (Italy)
    Appointed: April 1, 1909
    Presentation of Credentials: July 4, 1909
    Termination of Mission: Presented recall on October 7, 1911
  5. Ambassador Extraordinary and Plenipotentiary (Germany)
    Appointed: August 12, 1911
    Presentation of Credentials: October 24, 1911
    Termination of Mission: Left post on October 4, 1913
    • Commissioned to Germany.