Ole Thorsen Øisang (26 April 1893 – 6 March 1963) was a Norwegian newspaper editor and politician for the Labour Party.
He was born in Risør as the son of Theodor Thorsen Kjørvik (1866–1952) og Aase Marie Øisang (1869–1898). He was originally named Ole Kjørvik, but changed his last name to Øisang some time before 1910. As he lost his mother at the age of five, he lived in Søndeled with his uncle and aunt. He graduated from middle school in Kristiansand in 1910 and started his journalistic career as a subeditor in Sørlandets Socialdemokrat in 1912.
In 1915 he was hired as the editor-in-chief of Røros newspaper Arbeidets Rett. In Røros he met Ingebjørg Guldahl, whom he married in October 1917. He then became the editor-in-chief of Vestfold Arbeiderblad in 1918 and of Sørlandet in 1920. He also published pamphlets and books, including Klassesamfundets historie. Den sociale utvikling indtil industrialismens gjennembrud (1922) and Marxismens grunntrekk (1926). He has been elected into the national board of the Norwegian Labour Party in 1918, and served as a deputy representative to the Norwegian Parliament from the Market towns of Vest-Agder and Rogaland counties during the term 1925–1927. During the Labour Party turbulence in the 1920s, which saw the Social Democratic Labour Party and the Communist Party break away, Øisang tried to build bridges between the rival fractions. When this attempt failed, he remained with Labour. He was rewarded with the job as editor-in-chief of Arbeider-Avisa. He was known for lambasting the Communist Party in his editorials, especially the rival newspaper Ny Tid which was edited by Jørgen Vogt. In 1928 Øisang was elected to serve as a member of Trondheim city council.