William Howard Durham (1873–1912) was an early Pentecostal preacher and theologian, best known for advocating the Finished Work doctrine.
Durham was born in 1873 in rural Kentucky and joined his family's Baptist church; however, he would only experience conversion later. He joined the Holiness movement and by 1901 founded the North Avenue Full Gospel Mission, a store-front church in Chicago.
When the influence of the Los Angeles Azusa Street Revival spread to Chicago, one member of his congregation was baptized in the Holy Spirit. Initially, Durham was dubious about the new Pentecostal movement, but when he visited the Azusa Street Mission for himself, he had his own experience of Spirit baptism with speaking in tongues and was convinced. Upon returning to Chicago, Durham transformed his North Avenue Mission into a center to disseminate the Pentecostal revival in the Midwest and among ethnic minorities. Durham started publishing a periodical, The Pentecostal Testimony, and travelled extensivelly to diffuse the Pentecostal message.
Raised in a Reformed tradition, Durham found difficult to accept the then-widespread Wesleyan doctrine of a three-stage salvation process held by most Pentecostals. Durham began preaching the Finished Work doctrine that the Baptism of the Holy Spirit comes after salvation. Quickly Durham acquired supporters among Pentecostals of Reformed, Baptist, and Christian & Missionary Alliance backgrounds, and many missionaries abroad, but entered at odds with the older Pentecostal preachers, such as William Seymour, Charles Parham, and Florence L. Crawford.