David Long may refer to: David Long (New Zealand musician), New Zealand musician and composer Dave Long (runner) (born 1960), former long-distance runner from Great Britain Dave Long (American football) (born 1944), American football defensive lineman David Long (defensive back) (born 1998), American football defensive back (2018 All Big Ten first team) David Long Jr., American football linebacker (2018 Big 12 defensive player of the year) David Long (mandolin player) (born 1975), mandolin player from Nashville, Tennessee David C. Long (born 1955), Indiana state senator David H. Long (born 1961), American businessman David Martin Long (1953–1999), American murderer David Ryan Long, author