Halvor Olsen Folkestad (28 November 1807 – 30 September 1889) was a Bishop in the Church of Norway. He was appointed Norwegian Councillor of State in interim in 1875. Folkestad was born at Bø in Telemark, Norway. He was the son of Ole Halvorsen Folkestad (1778-1864) and Asberg Augundsdatter (1785-1866). He graduated in 1831 and then worked as a tutor in Gjerpen. After a year of studies in Christiania (now called Oslo), he received his theological degree in 1836.