Oswald Chambers (1874–1917) was a prominent preacher, writer, and evangelist. He studied at The Art School in South Kensington, the University of Edinburg, and Dunoon Training School.
Chambers served as a YMCA chaplain to British Commonwealth soldiers during World War I. He also worked as a traveling speaker for the League of Prayer and as the main teacher of the Bible Training College. His preaching ministry reached Britain, America, and Japan.