Others
- John Richardson (Quaker) (1667–1753), English Quaker minister and autobiographer
- Sir John Richardson (naturalist) (1787–1865), Arctic explorer and naturalist
- Sir John Richardson (judge) (1771–1841), judge in the Court of Common Pleas
- John Richardson (author) (1796–1852), Canadian novelist
- John Richardson (actor) (born 1934), English actor
- John Richardson (convict) (died 1882), Australian convict who accompanied several exploring expeditions as botanical collector
- John Richardson (special effects designer) (born 1946), British designer of visual effects
- John Richardson (Bishop of Bedford) (born 1937), Church of England bishop
- John Richardson (translator) (died 1625), Master of Trinity College, Cambridge, 1615–1625
- John Richardson (art historian) (born 1924), art historian, Picasso biographer
- John Richardson (businessman) (died 1831), Canadian businessman
- John M. Richardson (born 1938), American University professor, system dynamics and Sri Lanka scholar
- John H. Richardson (1913–1998), C.I.A. Station Chief in Saigon in early 1960s, see Albanian Subversion
- John Richardson (orientalist) (1740/1–1795), Oxford editor of A Dictionary; Persian, Arabic and English (1717)
- John Richardson (comics), artist and writer of comic books, see 2000 AD
- John Wigham Richardson (1837–1908), British shipbuilder
- John Richardson (Archdeacon of Southwark) (1817–1904), Anglican priest
- John Richardson (Archdeacon of Nottingham) (1849–1924), priest in the Church of England
- John Richardson (Archbishop of Fredericton) (1868–1938), Anglican Church of Canada bishop
- John Grubb Richardson (1813–1891), major Irish industrialist who founded the model village of Bessbrook near Newry
- John Richardson (Dean of Bradford) (born 1950), priest in the Church of England
- John Richardson (drummer) (born 1964), American rock drummer from Illinois
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