John Bradley may refer to:
- John Bradley (ironmaster) (1769–1816), English industrialist who set up the Stourbridge Ironworks
- John Bradley (d. 1844) (1787–1844), British artist and drawing-master to the Brontës
- John Bradley (artist) (fl. 1830–1840), British-American artist
- John Bradley (Wisconsin politician) (1817–1902), Republican member of the Wisconsin State Assembly
- John Bradley (bishop), 16th-century English bishop
- John Bradley (doctor) (1917–2004), Canadian doctor
- John Bradley (Australian politician) (1844–1900), Australian politician
- John Courtland Bradley (1887–1964), physician and politician in Ontario, Canada
- John E. Bradley (born 1971), Democratic member of the Illinois House of Representatives
- John J. Bradley (1831–1891), New York politician
- John R. Bradley (born 1970), British author and journalist
- John Bradley (historian) (1954–2014), Irish historian