Australian politician John Howard was prime minister of Australia from 1996 to 2007, and leader of the Liberal Party from 1985 to 1989 and from 1995 to 2007.

• Prime Minister
  (1939–)

Chemist John Dalton is credited with pioneering modern atomic theory. He was also the first to study color blindness.

• Scientist, Chemist, Meteorologist
  (1766–1844)

American physicist John Hall shared the 2005 Nobel Prize for Physics for his contributions to the development of laser spectroscopy.

• Scientist, Physicist
  (c. 1934–)

Nobel Prize winning English novelist and playwright John Galsworthy is remembered for evoking Victorian and Edwardian upper middle-class life in his work.

• Author, Playwright, Poet
  (1867–1933)

John Bardeen was co-winner of the Nobel Prize for Physics in 1956 for inventing the transistor and in 1972 for the theory of superconductivity.

• Scientist, Physicist, Educator, Inventor
  (1908–1991)

John Ambrose Fleming was an English scientist who made groundbreaking innovations in electrical engineering.

• Engineer, Educator, Academic
  (1849–1945)

Macfarlane Burnet was an Australian physician and researcher who made groundbreaking discoveries in the fields of immunology and virology.

• Doctor, Scientist, Biologist
  (1899–1985)

John D. MacArthur was an agriculturist and promoter who helped found the Australian wool industry, which became the world's largest.

• (c. 1767–1834)