James Dillon
James Dillon may refer to:
- James Dillon, 1st Earl of Roscommon, Irish peer
- James Dillon, 3rd Earl of Roscommon, leader of the Royalist forces in Ireland
- James Dillon , Victorian State politician for the electoral district of Essendon
- James Dillon , Roman Catholic Bishop of Kilmore, Ireland
- James Dillon , Scottish composer often regarded as belonging to the New Complexity school
- James Dillon , Irish politician and leader of the Fine Gael party
- James Dillon , farmer who served in the Senate of the Irish Free State
- James Dillon , Irish Confederate officer
- J. J. Dillon, retired American professional wrestler and manager
- James Dillon Armstrong, American lawyer, politician, and jurist from West Virginia