Denis Granville (name altered from Grenville) (13 February 1637 – 18 April 1703) was an English non-juring cleric, Dean of Durham and then Jacobite exile.
Richard Sanderson ordained him in 1661 and, on 10 July in the same year, he succeeded, on the presentation of his eldest brother, John Granville, 1st Earl of Bath, to the family living of Kilkhampton.
With the assistance of Bishop Nathaniel Crew he obtained, in spite of Archbishop William Sancroft's opposition, the deanery of Durham, to which he was instituted on 9 December 1684.
"[citation needed] He managed, however, to get into debt, and while Archdeacon of Durham and one of the king's chaplains in ordinary, he was arrested within the cloisters of the cathedral and imprisoned, though claiming his privileges.
His wife suffered from "occasional attacks of mental excitement";[citation needed] Granville was estranged from her father and her sister, Lady Gerrard.
He addressed the clergy of his archdeaconry on behalf of James, and even after Durham had been surprised by William's followers (Sunday, 9 December 1688) Granville delivered a loyal sermon.
Through family influence Grenville retained the revenues of his preferment for a time; but when he declined to take the oaths of allegiance to William III and Mary II he was deprived of them from 1 February 1691.
Granville was the most important churchman who accompanied James into exile, but was not allowed to perform the Anglican service; attempts were made to convert him to Catholicism.
In 1664 he printed a sermon and a letter, entitled "The Compleat Conformist, or Seasonable Advice concerning strict Conformity and frequent Celebration of the Holy Communion".