Henry Wilhelm Kristiansen (12 February 1902 – 16 January 1942) was a Norwegian newspaper editor and politician for the Communist Party. He served as party chairman from 1931 to 1934, and then as editor-in-chief of the party organ Arbeideren from 1934 until 1940. Due to the Nazi German occupation of Norway, the newspaper was closed in 1940, and Kristiansen was deported together with his wife in 1941, and died in Neuengamme concentration camp.
He was born in Drammen as the son of Martin Wilhelm Kristiansen and his wife Gina, née Olsen. He married the Russian Jew Mirjam Rathaus in 1928. The family settled in Nordstrand.
He joined the Norges Socialdemokratiske Ungdomsforbund in 1916, but at the Labour-Communist party split in 1923, he joined the Young Communist League. He had a brief stint as chairman of the Young Communist League in 1923.
In 1925 he became a member of the Communist Party politburo. After a stay in the Soviet Union from 1929 to 1931, he returned to Norway in 1931 to become party chairman. He was removed in 1934 at the hands of Comintern. Instead, he became editor-in-chief of the official party newspaper Arbeideren.
On 9 April 1940, Norway was invaded and occupied by Nazi Germany. The Communist Party and Arbeideren originally declared themselves neutral. On 16 August 1940, however, the Communist Party was outlawed, and the newspaper Arbeideren was shut down by the authorities. Kristiansen was arrested, but was released shortly thereafter. He continued as an underground member of the Communist Party, and is considered as the de facto party chairman during this period.