Sir Lucas Dillon (1530–1593), also called Luke Dillon, was a leading Irish barrister and judge of the Elizabethan era who held the offices of Attorney General for Ireland and Chief Baron of the Irish Exchequer. He supported the Lord Deputy Henry Sidney in the cess controversy. He assisted the Lord Deputy John Perrot in the Desmond Rebellions. He was held in high regard by Queen Elizabeth, but was accused by his enemies of corruption and maladministration.