Cadman is a surname. Notable people with the surname include:
Alan Cadman (born 1937), Australian politician Alfred Cadman (1847–1905), New Zealand politician Bill Cadman (born 1960), American politician from Colorado Charles Wakefield Cadman (1881–1946), American composer Christine Cadman (1908), British archer Chuck Cadman (1948–2005), Canadian politician Colin Cadman (1916–1971), Scottish botanist David Cadman, Vancouver city councillor Deborah Cadman (born 1963), British politician Dona Cadman (born 1950), Canadian politician Dorothy A. Cadman ( 1908–1927), English painter Elijah Cadman (1843–1927), English evangelist F. K. Cadman (1904–1931), British socialist John Cadman (disambiguation), multiple people Radclyffe Cadman (1924–2011), South African politician Robert Cadman (1711–1739), British steeplejack and tightrope walker Royce Cadman (born 1987), English rugby union player S. Parkes Cadman (1864–1936), American clergyman, newspaper writer Samuel Cadman (1877–1952), English cricketer Stacey Cadman (born 1979), British actress and television presenter William Cadman (1883–1948), English missionary William Cadman (priest) (1815–1891), English evangelist and clergyman