John Dillon Nugent (1869 – 1 March 1940) was an Irish nationalist politician, insurance representative and company director. He was born at Keady, County Armagh in 1869. He was the national secretary of the Ancient Order of Hibernians from 1904 until his death. He was elected as MP for the constituency of Dublin College Green at the by-election of 11 June 1915 following the death of Joseph Patrick Nannetti. He was defeated at the 1918 general election by Michael Staines of Sinn Féin contesting Dublin St Michan's.
At the Northern Ireland general election, 1921, Nugent was elected in the Armagh seat. He was defeated at the 1925 general election.