Marcus Olaus Bøckmann (January 9, 1849 – July 21, 1942), also recorded as Marcus O. Bockman, was a Norwegian-American Lutheran theologian.
Marcus Olaus Bøckmann was born at Langesund in Bamble municipality, Telemark county, Norway. He was educated at Egersund High School, Aars and Voss Latin School, and the University of Christiania (Oslo). After graduating as a Candidatus theologiæ, he was ordained as a priest of the Church of Norway.
Marcus Olaus Bøckmann immigrated to the United States during 1875. He served as a Lutheran pastor near Kenyon, Minnesota at Gol Lutheran Church 1875–1880 and at Moland Lutheran Church from 1880–1888. Having first worked as a Lutheran pastor for several years, he was appointed as a Professor of Theology at the Luther Theological Seminary operated by the Norwegian Synod in Saint Paul, Minnesota in 1886–90. He taught at Augsburg Seminary in Minneapolis, Minnesota from 1890–93. He was President of the United Church Seminary operated by the United Norwegian Lutheran Church in Saint Paul, Minnesota from 1893–1917. He was made a Knight 1st class of the Royal Norwegian Order of St. Olav by King Haakon VII of Norway in 1912. His official portrait in the reading room of the library of Luther Theological Seminary depicts him wearing the Knight's Cross of the Order on his Norwegian clerical cassock.