John Lonsdale (1788–1867) was a British bishop.
John Lonsdale may also refer to:
John Lonsdale, 1st Baron Armaghdale (1850–1924), British businessman and politician John Lowther, 1st Viscount Lonsdale (1655–1700), English politician John Lonsdale (historian) (born 1937), Emeritus Professor, University of Cambridge and Africanist John Lonsdale, Australian senior public servant and Chair of APRA