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