Politicians •
John Delaney (Bahamian lawyer) (born 1964), Bahamian lawyer and former Attorney General and Minister of Legal Affairs •
John Delaney (Maryland politician) (born 1963), American attorney, businessman, politician, and former 2020 Democratic presidential candidate •
John Delaney (Florida politician) (born 1956), American lawyer, politician and university administrator •
John J. Delaney (1878–1948), American businessman, lawyer and U.S. Representative •
John Delaney (meteorologist) (1811–1883), Irish-Canadian civil servant, meteorologist and political figure in Newfoundland •
John DeLany (Wisconsin lawyer) (1824–1882), Wisconsin lawyer, newspaperman and state representative
Sports •
John A. Delaney (hurler) (born 1986), Irish hurler from County Laois •
John Delaney (baseball) (born 1985), American college baseball coach •
John Delaney (football administrator) (born 1967), Irish former sports administrator •
John Delaney (footballer) (born 1942), former English footballer
Others •
John Delaney (businessman) (1969–2011), Irish businessman and founder of trading exchange website Intrade •
John C. Delaney (1848–1915), American Civil War soldier •
John Delany (luthier) (1769–1838), Irish musical instrument and violin maker •
John Bernard Delany (1864–1906), American Roman Catholic bishop •
John Albert Delany (1852–1907), Australian conductor and composer ==Other==