John Cosgrove may refer to:
John Cosgrove (actor) (1867–1925), Australian actor, writer and director John Cosgrove (Florida politician) (1949–2006), American politician from Florida John Cosgrove (Missouri politician) (1839–1925), U.S. Representative from Missouri John Cosgrove (Virginia politician) (born 1954), American politician and member of the Senate of Virginia John M. G. Cosgrove (born 1949), Garda Síochána and recipient of the Scott Medal
See also Jack Cosgrove (disambiguation)