Five United States Presidents were Unitarians: John Adams, Thomas Jefferson, John Quincy Adams, Millard Fillmore and William Taft. While he did not specifically identify with any organized religion, Abraham Lincoln had Universalist leanings. A sample of famous Unitarians, Universalists and Unitarian Universalists are listed below. For more check out the Wikipedia listing.

• Horatio Alger (1832-1899), writer of rags-to-riches books for boys.
• Lousia May Alcott (1832-1888), author of Little Women and other books.
• Susan B. Anthony (1820-1906), organizer of the women’s suffrage movement.
• P.T. Barnum (1810-1891), well-known showman, owner of the Barnum and Bailey Circus, and a founder of Tufts University.
• Clara Barton (1821-1912), founder of the American Red Cross.
• Alexander Graham Bell (1847-1922), inventor of the telephone; founder of Bell Telephone Company.
• Ray Bradbury (1920-2012), science fiction writer.
• William Cullen Bryant (1794-1878), author and newspaper editor.
• Luther Burbank (1849-1926), American Botanist of the early 20th century.
• Robert Burns (1759-1796), Scottish poet and songwriter.
• William Ellery Channing (1780-1842), abolitionist, founder of Unitarianism in America.
• Judy Chu (1953- ), U.S. Representative from California’s 28th District
• William Cohen (1940- ), U.S. Secretary of Defense, 1979-1997.
• Nathaniel Currier (1813-1888), lithographer, partner of James Merritt Ives.
• e.e.cummings (1894-1962), 20th century American Poet, noted for his unorthodox style and technique.
• Charles Darwin (1809-1882), scientist and evolutionist, author of Origin of the Species.
• Charles Dickens (1812-1870), English novelist.
• Dorothea Dix (1802-1887), crusader for the reform of institutions for the mentally ill.
• Ralph Waldo Emerson (1803-1882), Unitarian minister, philosopher, essayist.
• Fannie Farmer (1857-1915), cooking expert.
• Benjamin Franklin (1706-1790), scientist, writer, statesman, printer.
• Margaret Fuller (1810-1850), a feminist before her time. Leading figure in the Transcendentalist movement and an editor of The Dial, along with Ralph Waldo Emerson.
• William Lloyd Garrison (1805-1879), abolitionist, editor of The Liberator.
• Horace Greeley (1811-1872), journalist, politician, editor and owner of the New York Tribune, champion of labor unions and cooperatives.
• Edward Everett Hale 1822-1909), Unitarian minister and author of The Man Without a Country.
• Nathaniel Hawthorne (1804-1864), 19th century American novelist, author of The Scarlet Letter.
• John Haynes Holmes (1879-1964), co-founder of the American Civil Liberties Union.
• Oliver Wendell Holmes, Jr. (1841-1935), lawyer and member of the U.S. Supreme Court, 1902-32.
• Julia Ward Howe (1819-1910), composer of Battle Hymn of the Republic.
• Henry Wadsworth Longfellow (1807-1882), poet, author of Paul Revere’s Ride.
• James Russell Lowell (1819-1891), noted 19th century poet, anti-slavery leader, and Unitarian minister.
• John Marshall (1755-1835), Chief Justice of the United States Supreme Court.
• Herman Melville (1819-1891), writer, author of Moby Dick.
• Samuel Morse (1791-1872), inventor of the telegraph and Morse Code.
• Florence Nightingale (1820-1910), British nurse and hospital reformer.
• Thomas Paine (1737-1809), editor and publisher of Common Sense.
• Theodore Parker (1810-1860), a renegade Unitarian minister of the mid-19th century and a leading figure of the Abolitionist movement in the Boston area.
• Linus Pauling (1901-1994), chemist, won the Nobel Peace Prize, 1962.
• William Perry (1927 – ), former Secretary of Defense
• Beatrix Potter (1866-1943), author of Peter Rabbit and other children’s stories.
• Joseph Priestly (1733-1804), discoverer of oxygen.
• Christopher Reeve (1952-2004), actor, best known for his portrayal of Superman.
• Paul Revere (1735-1818), silversmith and patriot.
• Benjamin Rush (1745-1813), signer of the Declaration of Independence; physician, considered to be the “Father of American Psychiatry.”
• Pete Seeger (1919-2014), songwriter, singer, and social activist.
• Ted Sorenson (1928-2010), speech writer and aide to John F. Kennedy.
• Adlai Stevenson (1900-1965), Governor of Illinois, candidate for President, U.S. Ambassador to the U.N.
• Henry David Thoreau (1817-1862), essayist and naturalist, author of Walden Pond.
• Kurt Vonnegut (1922-2007), writer, author of Slaughterhouse-Five.