Lorenzo Dow (October 16, 1777 – February 2, 1834) was an eccentric itinerant American evangelist, said to have preached to more people than any other preacher of his era. He became an important figure in the Second Great Awakening and a popular writer. His autobiography at one time was the second best-selling book in the United States, exceeded only by the Bible.
Born at Coventry, Connecticut, Dow was a sickly child and was much troubled in his youth by "religious speculations," but ultimately joined the Methodist faith. In 1796 he made an unsuccessful application for admission into the Connecticut conference; but two years later he was received, and in 1798—despite the objections of his family—was appointed to be a circuit preacher, on a probationary basis, to the Cambridge circuit in New York. During the year he was transferred to Pittsfield, Massachusetts, and afterward to Essex, Vermont, but remained there only a brief time.
Dow made three visits to Ireland and England, in 1799, 1805 and 1818, and by his eccentric manners and attractive eloquence drew after him immense crowds. He took what he believed to be a divine call and crossed the Atlantic Ocean to preach as a missionary to the Catholics of Ireland, and thereafter was never connected officially with the ministry of the Methodist Church, though he remained essentially a Methodist in doctrine. He introduced camp meetings into England, and the controversy about them resulted in the organization of the Primitive Methodist Society.
In 1802 he preached in the Albany region of New York, against atheism, deism, Calvinism and Universalism. He passed the years 1803 and 1804 in what was then the Mississippi Territory (present day states of Mississippi and Alabama), delivering the first Protestant sermon within the bounds of those future states. Just south of Mansfield, Georgia, on State Route 11, is a large rock on which is a plaque, placed by the Daughters of the American Revolution. It states that on that rock, in 1803, Dow preached the first "Gospel sermon" in Jasper County. In 1807 he extended his labors into Louisiana Territory.