Roy Tasco Davis (1889–1975)

Non-career appointee
States of Residence: Maryland, Missouri
  1. Envoy Extraordinary and Minister Plenipotentiary (Guatemala)
    Appointed: October 8, 1921
    • Took oath of office, but did not proceed to post.
  2. Envoy Extraordinary and Minister Plenipotentiary (Costa Rica)
    Appointed: February 10, 1922
    Presentation of Credentials: March 14, 1922
    Termination of Mission: Left Costa Rica. January 4, 1930
  3. Envoy Extraordinary and Minister Plenipotentiary (Panama)
    Appointed: December 16, 1929
    Presentation of Credentials: March 14, 1930
    Termination of Mission: Left Panama September 20, 1933
  4. Ambassador Extraordinary and Plenipotentiary (Haiti)
    Appointed: July 6, 1953
    Presentation of Credentials: September 23, 1953
    Termination of Mission: Relinquished charge March 9, 1957