Linn Markley Farish (1901 - 1944) was an American citizen and a member of the Office of Strategic Services (OSS) during World War II. The OSS was the predecessor agency of the Central Intelligence Agency (CIA). Farish functioned as liaison officer with Josip Tito's Yugoslav Partisans for the OSS. Farish also at the same time was serving Soviet intelligence. Farish died in an aircraft crash in the Balkans in September 1944. Farish's code name in Soviet intelligence, and as decyphered in the Venona project is "Attila".
Farish is referenced in the following Venona project decryption:
- 1397 KGB New York to Moscow, 4 October 1944
- John Earl Haynes and Harvey Klehr, Venona: Decoding Soviet Espionage in America, Yale University Press (1999), pgs. 194, 195.