People with the surname Downer include:
Alec Downer (1910-1981), John Downer's son and a former Australian Minister for Immigration
Alexander Downer (born 1951), John Downer's grandson and Australian Minister for Foreign Affairs between 1996 and 2007
Alfred Wallace Downer, a Canadian politician
Billy Downer (born 1956), deputy director of public prosecutions with the South African National Prosecuting Authority
George Downer (1839-1916) South Australian lawyer and businessman, brother of John Downer
Hunt Downer (born 1946), Republican politician in the U.S. state of Louisiana
John Downer (1843-1915), a Premier of South Australia and member of the inaugural Australian Senate
Naleya Downer (born 1980), Jamaican retired sprinter
Sidney Downer (1909–1969), South Australian journalist
Wally Downer (1904-1994), Canadian politician
