Orville Dewey (March 28, 1794 - March 21, 1882) was an American Unitarian minister. Dewey was born in Sheffield, Massachusetts. He was naturally thoughtful, and was encouraged in his love of reading by his father. In 1823 he became pastor of the Unitarian Church in New Bedford, remaining there for ten years, until he went to Europe on account of his health. He was called to the second Unitarian Church of New York in 1835, which during his ministry built the Church of the Messiah. In 1840, he was elected into the National Academy of Design as an Honorary Academician. In 1842 his health again failed, and he went a second time to Europe, returning in 1844.