Thomas De Witt Talmage (January 7, 1832 – April 12, 1902) was a preacher, clergyman and divine in the United States who held pastorates in the Reformed Church in America and Presbyterian Church. He was one of the most prominent religious leaders in the United States during the mid- to late-19th century, equaled as a pulpit orator perhaps only by Henry Ward Beecher. He also preached to crowds in England. During the 1860s and 70s, Talmage was a well-known reformer in New York City and was often involved in crusades against vice and crime.

During the last years of his life, Dr. Talmage ceased preaching and devoted himself to editing, writing, and lecturing. At different periods he was editor of the Christian at Work (1873–76), New York; the Advance (1877–79), Chicago; Frank Leslie's Sunday Magazine (1879–89), New York; and the Christian Herald (1890–1902), New York. Each week he was said to have preached to audiences of 8,000 people, and for many years his sermons were published regularly in more than 3,000 journals, through which he was said to reach 25,000,000 readers.