Dineen is an Irish surname. It is derived from the Gaelic Ó Duinnín ‘descendant of Duinnín', a diminutive of Donn 'dark, brown'. The Ó Duinnín were hereditary historians to the MacCarthy Mór. People with the surname include:
Bill Dineen (1932–2016), ice hockey player and coach Bobby Dineen (1919–1984), Irish sportsperson Carolyn Dineen King (born 1938), American judge David Dineen-Porter (born 1979), Canadian actor, comedian and musician Donal Dineen (born 1969), Irish radio and television presenter, photographer, film maker Gary Dineen (1943–2006), Canadian hockey personality Gord Dineen (born 1962), ice hockey player and coach Hannah Dineen, Irish camogie player James Owen Dineen (1920–1975), Canadian engineer and university administrator John Dineen (1935–2025), Australian footballer Kerry Dineen (1952–2015), baseball player Kevin Dineen (born 1963), ice hockey player and coach Molly Dineen (born 1959), UK television documentary director, cinematographer and producer Patricia Dineen (1936–1961), American figure skater, wife of Robert Patrick Dineen (born 1938), Irish cricketer Peter Dineen (born 1960), American ice hockey player Robert Dineen (1937–1961), American figure skater, husband of Patricia Seán Dineen (1944–2024), Irish mathematician Sylvester A. Dineen (1898–1950), American schoolteacher and politician
See also Dinneen Downing