Dennis Sullivan (born 1941) is an American mathematician. Dennis Sullivan may also refer to: Dennis Sullivan (cricketer) (1883–1968), English cricketer Dennis B. Sullivan (1927–2020), U.S. Air Force general Dennis Joseph Sullivan (born 1945), American prelate of the Roman Catholic Church Dennis Mark Sullivan (1841-1917), American businessman and politician Dennis Michael Sullivan, American electrical engineer Dennis T. Sullivan (died 1906), American Chief of the San Francisco Fire Department in 1906 Dennis Sullivan, producer of Pork, a political talk show on the America's Talking network See also Denis Sullivan (disambiguation) Dennis O'Sullivan (disambiguation)