|Full name||Ralph Stewart Sewer|
|Date of birth||13 September 1951|
|Height||174 cm (5 ft 9 in)|
|Weight||79 kg (174 lb)|
|1969-1980, 1985-1990||Woodville||325 (396)|
|Representative team honours|
|South Australia||12 (5)|
Ralph Sewer is a retired fireman and Australian rules footballer who played for both the Woodville Football Club and Glenelg Football Club in the South Australian National Football League. Sewer played 12 matches for South Australia. Sewer is also the only player to have played in four decades of football in SANFL.