John Francis Connolly (1860–1928) was an Australian prospector and mine owner. Born in Victoria, he prospected and owned mines in New South Wales. He discovered a platinum field at Fifield before joining the gold rush to Cossack, Western Australia in 1889.

Bishop John Connolly (1750–February 6, 1825), born at Slane, County Meath, Ireland, was the second bishop of the Roman Catholic diocese of New York.

John Connolly (born May 31, 1968, Dublin) is an Irish crime writer who is best known for his series of novels starring private detective Charlie Parker. His first novel, Every Dead Thing, was met with critical acclaim; it was nominated for the Bram Stoker Award for Best First Novel and went on to win the 2000 Shamus Award for Best First Private Eye Novel (he is the first author outside of the US to have won that award). Connolly’s debut introduced readers to the anti-hero Charlie Parker, a former police officer hunting the killer of his wife and daughter.