Edgar Leo Gustav Prochnik (21 January 1879 – 12 April 1964) was an Austrian diplomat and writer.

He held this position until June 1920 when he was appointed Austrian Consul General in Washington, D.C.[4] He was promoted to Chargés d'affaires ad interim on 2 December 1921.

On 7 May 1925, he was accredited as Envoy Extraordinary and Minister Plenipotentiary and presented his credentials to President Calvin Coolidge the next day, 8 May 1925.

[5][6] He served as Envoy and Minister until 13 March 1938 when the legation was closed and his mission was terminated due to the Anschluss with Germany.

[9] He remained in the United States where he lectured on diplomatic history in the School of Foreign Service at Georgetown University until 1960.