Just Lippe (13 January 1904 – 24 March 1978) was a Norwegian journalist and politician for the Communist Party.

He was born in Bergen^[1] as the son of Jakob von der Lippe (1870–1954). He was related to the von der Lippes family (as follows): brothers Frits and Jens, brother-in-law Margrethe, grandson of Conrad Fredrik, great-grandson of Bishop Jacob and first cousin once removed of Admiral Jakob^[2] and whaler Anton.^[3]

He joined the Norwegian Labour Party in 1921, but joined the Communist Party when it split from Labour.^[1] In 1927 he was imprisoned (five weeks of detention, without conviction) together with Henry W. Kristiansen, Otto Luihn and Albin Eines, after a police raid in the party offices.^[4] He was a secretary in the Young Communist League of Norway from 1925 to 1929,^[1] and chaired the organization from 1927 to 1928. In 1928 he became an executive committee member of the Young Communist International.^[5] In 1929 he became a member of the Communist Party secretariat.^[1] In the early 1930s he headed the Scandinavian section of the International Lenin School in Moscow, before he was relocated to Vladivostok.^[5] He later returned to Norway. He was a central board member of the Communist Party from 1937 to 1945 and 1950 to 1972. From 1949 to 1963 he was the party secretary.^[1] During the Second World War, he fled to Sweden in 1941 to escape the German occupation of Norway. He was imprisoned in Sweden for a year and a half, and when released, he continued to the United Kingdom where he enrolled in the Norwegian military-in-exile.^[5]

He worked as a journalist in Arbeideren before the war, and in Friheten from 1947 to 1949.^[1] In 1963 he edited the official party history, Norges kommunistiske partis historie.^[6]