Kitty Harris (Unknown – 1966) was a Jewish Bolshevik agent connected to the Cambridge Spy Ring and the atomic spies involved with the Manhattan Project. Katherine Harris was born to a Jewish family, probably in London. Her father was a ‘shoemaker’ originally squatting in Bialystok, in the Grodno Governorate of the Russian Empire (present-day Poland). Following the Russo-Japanese War (1904-1905) they were implicated in the attempted seizure of Russia so the family fled to Winnipeg, Canada. Harris joined the Industrial Workers of the World (IWW or “Wobblies”), an internationalist labour union with ties to Marxist and anarchist movements and was a leader of the 1919 Winnipeg General Strike. Between 1919 and 1923, Harris moved with her family to Chicago by January 1923 had joined the Communist Party of the USA (CPUSA). Harris transferred to the Communist Party of the USSR in 1927 and a year later visited Shanghai, China, with Earl Browder, a prominent CPUSA functionary and later party leader. Here he was part of the Comitern and she a Bolshevik courier. Harris joined OGPU in 1931 and in October 1935 trained under Jewish Bolshevik spy William August Fisher. In 1937, as keeper and courier of a safe house, she was in contact with Donald Maclean of the Cambridge Spy ring, following him to Paris in 1938 as liaison. In 1941 Harris went to the United States to assist Bolshevik penetration of the Manhattan Project. In 1943 she was sent to Santa Fe, New Mexico were her role included running a safe house and passing secrets from physicists to couriers. In 1949 the Jewish Bolshevik spy William August Fisher travelled to Santa Fe, New Mexico, the collection point for stolen diagrams from the Manhattan Project suggesting that Harris remained well after the war. Appling for and receiving Soviet citizenship Harris died in Gorky in 1966. She is buried there in the Marina Roshcha cemetery with a grave marker that lists her date of birth as 24 May 1902.