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- Ellen Page, Canadian actress.
- Linus Pauling, American chemist, biochemist, peace activist, author, and educator. Given the title, "Humanist of the Year" in 1961 by the American Humanist Association.
- Neil Peart, Canadian musician and author. He is the drummer and lyricist for the rock band Rush. Peart has received numerous awards for his musical performances, and is known for his technical proficiency and stamina.
- Steven Pinker is a Humanist Laureate in the International Academy of Humanism.
- Charles Francis Potter was a signer of the original Humanist Manifesto.
- Karl Popper was a Humanist Laureate in the International Academy of Humanism.
- Sir Terry Pratchett, British novelist and satirist.
- Philip Pullman, English writer.
Read more about this topic: List Of Humanists