List of Atheists and Agnostics

The idea for this list came from
Happy Furry Puppy Story Time with Norbizness

Full lists on Wikipedia and CelebAtheists
The best list I have seen is Famous Dead Nontheists...

• Charles Darwin, (1809-1882) "my judgment often fluctuates...In my most extreme fluctuations I have never been an Atheist in the sense of denying the existence of a God. I think that generally (and more and more as I grow older), but not always, that an Agnostic would be the more correct description of my state of mind."
• Thomas Henry Huxley, (1825-1895)
• Robert Ingersoll, (1833 - 1899)
• Bertrand Russell, (1872-1970)
• Carl Sagan, (1934-1996)
• Ingmar Bergman (1918-)
• George Carlin (1937-)
• Michael Newdow -
  
• Peter Singer (1946-)
• Warren Allen Smith
• James D. Watson (1929- )
• Douglas Adams (1951-2001)
  
• Albert Camus (1913-1960)
  
• Clarence Darrow (1857-1938)
• David Hume (1711-1776)
  
• Friedrich Nietzsche (1844-1900) "God is dead".
• Sir Karl Popper (1902-1994)
  
• Marquis de Sade (1740-1814) -
  
• Jean-Paul Sartre (1905-1980)
  
• Burrhus Frederic Skinner (1904-1990)
  
• Francois Marie Arouet "Voltaire" (1694-1778)
• Benjamin Franklin (1706-1790)
  "Many a long dispute among divines may be thus abridged: It is so; It is not so. It is so; it is not so."
  "The way to see by faith is to shut the eye of reason."
• Thomas Paine (1737-1809)
  "All national institutions of churches, whether Jewish, Christian or Turkish appear to me no other than human inventions, set up to terrify and enslave mankind and monopolize power and profit."
  
• James Madison (1751-1836)
  "During almost fifteen centuries has the legal establishment of Christianity been on trial. What has been its fruits? More or less, in all places, pride and indolence in the clergy; ignorance and servility in the laity; in both, superstition, bigotry, and persecution."
  "In no instance have . . . the churches been guardians of the liberties of the people."
  "Religious bondage shackles and debilitates the mind and unfits it for every noble enterprise.
• Abraham Lincoln (1809-1865) Lincoln in a letter to Judge J.S. Wakefield, after the death of Willie Lincoln: "My earlier views of the unsoundness of the Christian scheme of salvation and the human origin of the scriptures have become clearer and stronger with advancing years, and I see no reason for thinking I shall ever change them."
• Edgar Allan Poe (1809-1849) "No man who ever lived knows any more about the hereafter ... than you and I; and all religion ... is simply evolved out of chicanery, fear, greed, imagination and poetry."
• Samuel Clemens (1835-1910)
  "O Lord our God, help us tear their soldiers to bloody shreds with our shells; help us to cover their smiling fields with the pale forms of their patriot dead; help us to drown the thunder of the guns with the shrieks of their wounded, writhing in pain; help us to lay waste their humble homes with a hurricane of fire; help us to wring the hearts of their unoffending widows with unavailing grief; help us to turn them out roofless with their little children to wander unfriended the wastes of their desolated land in rags and hunger and thirst, sports of the sun flames of summer and the icy winds of winter, broken in spirit, worn with travail, imploring Thee for the refuge of the grave and denied it . . ."
  
• Thomas Edison (1847-1931)
  "Religion is all bunk." "I have never seen the slightest scientific proof of the religious ideas of heaven and hell, of future life for individuals, or of a personal God."
• George Bernard Shaw (1856-1950)
  "The fact that a believer is happier than a skeptic is no more to the point than the fact that a drunken man is happier than a sober one."
• Frank Lloyd Wright (1869-1959)
  "I believe in God, only I spell it Nature."
• Aldous Huxley (1894-1963)
  "You never see animals going through the absurd and often horrible fooleries of magic and religion. . . . Dogs do not ritually urinate in the hope of persuading heaven to do the same and send down rain. Asses do not bray a liturgy to cloudless skies. Nor do cats attempt, by abstinence from cat's meat, to wheedle the feline spirits into benevolence. Only man behaves with such gratuitous folly. It is the price he has to pay for being intelligent but not, as yet, quite intelligent enough."
  
• George Orwell (1903-1950)
• John Chancellor (1927-1996)
  Jack Thomas wrote in the Boston Globe, ...asked Chancellor whether he feared death to which he replied "not as much as I would have thought..." Thomas then asked what he thought would happen to him after death. Chancellor replied "I've been an agnostic for as long as I can remember... so I don't know where we go. But if it turns out that the lights are just turned off and nothing happens, well, that's OK."
• John Lennon (1940-1980) Imagine there's no heaven, It's easy if you try, No hell below us, Above us only sky, Imagine all the people living for today. Imagine there's no countries. It isn't hard to do. Nothing to kill or die for , No religion too
• Frank Zappa (1940-1993) "Who you jivin' with that cosmic debris?""Reality is what it is, not what you want it to be.""If you want to get together in any exclusive situation and have people love you, fine -- but to hang all this desperate sociology on the idea of The Cloud-Guy who has The Big Book, who knows if you've been bad or good -- and CARES about any of it -- to hang it all on that, folks, is the chimpanzee part of the brain working.
• Barry White (1944-2003) Referring to religion, Barry told Reuters in 1999 interview, "I don't like stories, things I can't prove."