Kaare Fostervoll (3 December 1891 – 6 July 1981) was a Norwegian educator and politician for the Labour Party. From 1949 to 1962 he was the director-general of the Norwegian Broadcasting Corporation (NRK).
He was born in Kristiansund as a son of school manager Kristen Fostervoll (1856–1920) and Anna Karoline Kvande (1863–1941). He took the examen artium in 1910, graduated from Volda Teacher's College in 1912, and worked as a teacher at various schools from 1912 to 1927. In 1927 he got the cand.philol. degree, and in the same year he became principal of Firda Upper Secondary School, a position he held until 1938 when he got the same position in Ålesund. At Firda he was Norway's youngest principal.
While studying he was chairman of Studentmållaget from 1919 to 1920 and the Norwegian Students' Society in 1923. He became chairman of the Students' Society because of a coalition with Mot Dag. He later denounced Mot Dag's revolutionary tendencies, but remained an anti-militarist, opposing NATO in the 1940s. Becoming involved in politics in the 1920s, he was a secretary of the Socialist Youth League of Norway from 1923 to 1925, and vice chairman from 1925 to 1927. In the same year, this youth wing of the Social Democratic Labour Party ceased to exist because the party was incorporated into the Norwegian Labour Party. Fostervoll was later a board member of Noregs Mållag from 1931 to 1932 before returning to politics as local chapter leader of the Labour Party in Gloppen from 1934 to 1938. In the same period he was secretary for the county chapter.