Theodore Pollock Ferguson (January 10, 1853 – July 12, 1920) was a pioneer leader in the American Holiness Movement, a Christian evangelist and social worker who co-founded the Peniel Mission and Peniel Missionary Society.
He was converted in 1875 in Oberlin, Ohio, through the preaching of evangelist Charles Finney.
In 1880 he was entirely sanctified during a holiness revival meeting in California.
On June 7, 1883, he married Manie Payne Ferguson.
They moved to Los Angeles, California, during the boom of 1885–86.