Kim Yong-ju (Chosŏn'gŭl: 김영주; born 21 September 1920) is a North Korean politician and the younger brother of Kim Il-sung, who ruled North Korea from 1948 to 1994. Under his brother's rule, Kim Yong-ju held key posts in the Workers' Party of Korea during the 1960s and early 1970s, but he fell out of favor in 1974 following a power struggle with Kim Jong-il. Since 1998, he has held the ceremonial position of Honorary Vice President of the Presidium of the Supreme People's Assembly, North Korea's parliament.
Kim Yong-ju was born to Kim Hyŏng-jik and Kang Pan-sŏk in Mangyŏngdae in 1920, 8 years after his elder brother Kim Il-sung.
After graduating from economics department at the Moscow State University in 1945, where he also took a deep interest in philosophy, Kim Yong-ju joined the Workers' Party of Korea. His rise through the party's echelons was fast: from the 1950s to the 1960s he was chief cadre (1954), vice-director (1957) and finally director (1960) of the WPK Organization and Guidance Department, and he was appointed member of the WPK Central Committee at the Party's 4th Congress in 1961. In 1966 he was promoted to Organizing Secretary of the WPK Central Committee.
In 1967, he proposed to his brother the "Ten Principles for the Establishment of the One-Ideology System" (whose first principle was: "We must give our all in the struggle to unify the entire society with the revolutionary ideology of the great leader Comrade Kim Il Sung"), which were published only in 1974.