He was created 1st Viscount Blesington (in the Peerage of Ireland) and 1st Baron Boyle, on 23 August 1673, with a special remainder to the male heirs of his father.
Baker, a contemporary dramatic critic, characterised this production as "truly contemptible", and added that the "genius and abilities of the writer did no credit to the name of Boyle".
He had married twice; firstly Mary Parker, daughter of Dr. John Parker, Archbishop of Dublin and Mary Clarke, and secondly Lady Ann Coote, daughter of Charles Coote, 2nd Earl of Mountrath and Alice Meredyth.
Alicia married Pierce Butler, 4th Viscount Ikerrin and had one son James who succeeded to his father's title but died young.
On Charles' death without a male heir, his estates passed to his surviving sister Anne.