Olav Martinius Knutsen Steinnes (9 January 1886 – 26 June 1961) was a Norwegian educator and politician for the Labour Party and Nasjonal Samling. He was born at Steinnes in Ørsta as a son of farmers Knut Olai Olavsen Steinnes (1856–1935) and Berte Sporstøyl (1860–1924). After some years as a laborer he attended and then Volda Teachers' College from 1907 to 1910. He worked as a teacher in Vikna from 1910 to 1912, then in Rjukan. In 1920 he was promoted to school headmaster, still in Rjukan. He remained here until 1935, when he was appointed as school director in the Dioceses of Agder and Stavanger.