Haddon is a surname. Notable people with the surname include:
A Alfred Cort Haddon (1855–1940), British anthropologist April Haddon, fictional character Arthur Langan Haddon (1895-1961), New Zealand Church of Christ minister Arthur Trevor Haddon (1864-1941), British painter
C Caroline Haddon (1837-1905), philosophical writer Celia Haddon (born 1944), British journalist and writer
D Damita Haddon (born 1971), American gospel singer Dayle Haddon (1948–2024), Canadian model and actress Deitrick Haddon (born 1973), American gospel singer
E Elizabeth Haddon (1680–1762), American colonist and Quaker
F Frederick William Haddon (1839-1906), Australian journalist and newspaper editor
H Harry Haddon (1871-after 1896), English professional footballer
J James Haddon (fl. 1556), English clergyman Jenny Haddon (born 1933), English writer of romance novels under the name Sophie West
K Kathleen Haddon (1888-1961), British scholar of string-figures
L Laurence Haddon (1922–2013), American television actor Lloyd Haddon (born 1938), American hockey player
M Mark Haddon (born 1962), English novelist
O Oriwa Tahupotiki Haddon (1898-1958), New Zealand Methodist minister
P Peter Haddon (1898-1962), English actor
R Robert Joseph Haddon (1866-1929), English born Australian architect Robert Tahupotiki Haddon (1866-1936) New Zealand Methodist minister Ryan Haddon (born 1971), journalist and TV producer
S Sam E. Haddon (born 1937), United States federal judge
T Thomas Haddon (1913-1993), British soldier Trevor Haddon (1864-1941), British painter
V Vivien Haddon (born 1945), New Zealand swimmer
W Walter Haddon (1515-1572), English civil lawyer William Haddon Jr. (1926-1985), the inventor of the Haddon Matrix, the most common tool in the injury prevention field