Paul Klein may refer to:
Paul Klein (missionary) (1652–1717), Czech Jesuit missionary in the Philippines, pharmacist and Cavite College rector, often referred to as Pablo Clain, or Paulus or Pavel Klein Paul L. Klein (1929–98), developer of pay-per-view TV channels and creator of the least objectionable program theory Paul Klein (chess player) (1915–1992), German–Ecuadorian chess player Paul Klein (art dealer) (1946–2020), American art activist from Chicago Paul Klein, musical theatre composer who collaborated with the lyricist Fred Ebb Paul Klein (musician), American musician and record producer
See also Paul Kline (1937–1999), psychologist Paul Kline (photographer) (born 1964), American photographer Pauline Klein (born 1976), French writer