William Painter or Paynter may refer to
William Painter (author) (1540?–1594), English author and translator William Painter (inventor) (1838–1906), American inventor of the crown cork and the founder of Crown Holdings, Inc. William Paynter (academic) (1637–1716), English clergyman and Vice-Chancellor of Oxford University Will Paynter (1903–1984), Welsh miners' leader William Henry Paynter (1901–1976), Cornish antiquary and folklorist William Hunt Painter (1835–1910), English botanist William Rock Painter (1863–1947), American politician from Missouri