Theodore Christian Blegen (16 July 1891 – 18 July 1969) was an American historian and writer. Blegen was the writer of numerous historic reference books, papers and articles written over a five decade period. His primary areas of focus were of the history of the state of Minnesota and of Norwegian-American immigration. Background Theodore Christian Blegen was born in Minneapolis, Minnesota to Anna Regine (1854-1925) and John H. Blegen (1851-1928), both of whom had emigrated from Lillehammer, Norway. His father was a professor at Augsburg College in Minneapolis and played a central role in the Norwegian Lutheran Church in America. He was the younger brother of noted archaeologist Carl Blegen. Blegen’s undergraduate studies at Augsburg College B.A. (1910) were followed by graduate work at the University of Minnesota M.A. (1915), Ph.D. (1925) that led to a doctorate in history. In 1928, he was a Guggenheim Fellow and studied in Norway. Career Blegen did high-school teaching at Fergus Falls, Minnesota, and at Milwaukee, Wisconsin. Blegen was a professor of history (1920–1927) at Hamline University in St. Paul, after which he moved to the University of Minnesota (1927–1939), later serving as dean of the graduate school (1940–1960). His career with the Minnesota Historical Society began in 1922, serving an apprenticeship in the arts of editing and meticulous research. He succeeded to the position of superintendent of the historical society, and a seat on the executive council, serving until 1939. He returned to the Society as a research fellow in 1960 after his retirement from teaching. In 1925, Blegen was appointed the first managing editor of the Norwegian-American Historical Association. During World War II, he directed the National Historical Service, preparing materials for the U.S. Army's G.I. Roundtable. He was elected president of the Organization of American Historians in 1943. He was also one of the founders of the Forest History Society, serving two terms as president. He was elected a Fellow of the Society in 1963, and for more than twenty years served on the Society's executive committee. The Forest History Society initiated the Theodore C. Blegen Award in 1972. Blegen received recognition in the form of honorary degrees from Hamline University, Carleton College, St. Olaf College, Luther College, and Augustana College. Blegen was made honorary doctor at the University of Oslo, 1938. He was a member of the Norwegian Academy of Science and Letters from 1946 and The Royal Norwegian Society