James Freeman Clarke was an American minister, theologian and author.

James Freeman was an American Unitarian clergyman and writer, "noteworthy as the first avowed preacher of Unitarianism in the United States". After graduating Harvard and becoming pastor of King's Chapel in Boston, Freeman's revised Book of Common Prayer was adopted by the congregation. This and Freeman's later ordination are credited as the origins of Unitarianism in New England. Later receiving a D.D. from Harvard Divinity School, he was also a founding member of the Massachusetts Historical Society.