Belle Caldwell Culbertson (née , Caldwell; February 23, 1857 – August 4, 1934) was an American author and philanthropist, active in social and religious reforms. She served as president, Woman's Foreign Missionary Society of the Presbytery of Washington City; president, Woman's Inter-Denominational Missionary Union of the District of Columbia; and president, Washington Auxiliary Mission to Lepers. Other positions included: Trustee, Anti-Saloon League; Trustee, International Reform Bureau; vice-president, Mothers' Congress of D.C.; and member, Executive Board, Woman's Christian Temperance Union (W.C.T.U.).