Haddon is a surname. Notable people with the surname include:

  • Harry Haddon (1871-after 1896), English professional footballer
  • James Haddon (fl. 1556), English clergyman
  • Jenny Haddon (born 1933), English writer of romance novels under the name Sophie West
  • Walter Haddon (1515-1572), English civil lawyer
  • Dr. William Haddon Jr., the inventor of the Haddon Matrix, the most common tool in the injury prevention field