Samuel Dennis, D.D., was an English academic administrator at the University of Oxford. Dennis was elected President (head) of St John's College, Oxford in 1772, a post he held until 1795.During his time at St John's College, more rooms were added on the north side of the college.Dennis was also Vice-Chancellor of Oxford University from 1780 until 1784. A monument was erected in the college to his memory in 1795, sculpted by Richard Westmacott (the elder).