Frank Bradford Warner was born in Sunderland, Massachusetts, on September 2, 1886. He received a Bachelor of Arts degree from Amherst College in 1908. After teaching in New Jersey for several years, he enrolled in the Oberlin Graduate School of Theology where he studied 1912-14. He was ordained as a Congregational minister at Sunderland, Massachusetts, on August 7, 1914.
During the summer of 1914, prior to leaving for China to take up missionary work, Warner enrolled in summer school in Middlebury, Vermont. There he met Maude Rosamund Bowman (1888-1991; enr. 1925-26), a graduate of Knox College in Illinois. In 1915, Maude joined him in China and they were married in a civil ceremony in Beijing on September 23, with a second ceremony in Tientsien on October 5. Frank and Maude Warner had three children: Jean (b. 1916), Constance (1917-2003; A.B. 1939), and Bradford (1921-2002; enr. 1946-50).
Frank Warner served as a missionary teacher in China with the American Board of Commissioners for Foreign Missions (ABCFM). He served at the mission in Fenzhou, Shanxi Province, 1914-18, and at Ming Hsien, the Oberlin Shansi Memorial Schools, in Taigu, Shanxi Province, 1918-22. At Ming Hsien Warner was instrumental in developing the Christian school's Teachers' Training Department.
The Warners returned to the United States on furlough in 1922. In January 1923, they moved to Oberlin, so Frank Warner could continue his graduate work in the Oberlin Theological Seminary. Unfortunately, he was forced to drop his studies because of illness.
Frank B. Warner died of pneumonia on June 15, 1923 in Oberlin, Ohio. Following his death, Maude Bowman Warner taught English and served as dean of girls at Oberlin High School from 1923 to 1947. From 1947-52, she served as a house director for Oberlin College dormitories, leaving in 1952 to take up a similar position at the University of Southern California. She died in California in 1991.