Roy Tasco Davis (June 4, 1889 – December 27, 1975) was an American diplomat who served as ambassador to Costa Rica, Haiti, Panama.

[2] Born in Ewing, Missouri, on June 4, 1889, Davis received his education from the public schools of Missouri, and from Brown University, from which he graduated in 1910.

[3] Nominated by President Warren G. Harding on February 7, 1922, to become minister to Costa Rica,[4] he served in that position from 1922 to 1930.

After service abroad, Davis served as a member of the Maryland State Senate from 1947 to 1951.

[6] Roy Tasco Davis died on December 27, 1975, in Silver Spring, Maryland, at the age of 86.