Isabel Gallardo was a Chilean resident of the United States who was married to American U.S. Marine Captain Lorren Hay. During World War II, Gallardo worked for the Soviet intelligence on projects involving Chile.
Isabel Gallardo is referenced in the following Venona decrypted message:
- 768 KGB New York to Moscow, 25 May 1943.
- John Earl Haynes and Harvey Klehr, Venona: Decoding Soviet Espionage in America, Yale University Press (1999), pgs. 350, 451.