| South Open | |
| Location: | Mar del Plata, Argentina |
| Establishment: | 1918 |
| Course: | Mar del Plata GC |
| Par: | 70 |
| Tour: | PGA Tour Latinoamérica Developmental Series |
| Format: | Stroke play |
| Month Played: | February |
| Aggregate: | 256 Miguel Ángel Martín |
| Current Champion: |  Estanislao Goya |
The South Open, or Abierto del Sur, is one of the major regional open golf tournaments in Argentina, and is also one of the oldest, having been inaugurated 1918. It has always been held at the Mar del Plata Golf Club in Mar del Plata, Buenos Aires Province. The course plays to a par of 70, and the course record is 59, which was set by Miguel Ángel Martín in the 1987 Open.
The tournament was founded as the Abierto de Aficionados y Profesionales (the Professionals and Amateurs Open), and was renamed as the Abierto de Mar del Plata (Mar del Plata Open) in 1925, before being given its current title in 1939.
| Year | Winner | Score | Runner-up | Amateur winner | |
|---|---|---|---|---|---|
| 2019 | 265 | ||||
| 2018 | 260 | ||||
| 2017 | Marcos Monttenegro (a) | 264 | |||
| 2016 | 270 | ||||
| 2015 | 269 | ||||
| 2014 | 268 | ||||
| 2013 | 272 | ||||
| 2012 | 196 | ||||
| 2011 | 263 | ||||
| 2010 | |||||
| 2009 | Rodolfo González | 271 | Gonzalo Ramacciotti | ||
| 2008 | 271 | Esteban Martinez | |||
| 2007 | 266 | Carlos Cardeza | Ary Rodriguez | ||
| 2006 | Luciano Giometti | 278 | Juan I. Gil | ||
| 2005 | Rodolfo González | 280 | Alan Wagner | ||
| 2004 | 270 | Tomas Argonz | |||
| 2003 | 274 | Armando Saavedra, Gustavo Rojas, C. Machado, F. Montovia | Emilio Domínguez | ||
| 2002 | No tournament | Luciano Giometti | |||
| 2001 | Juan Pablo Abbate* | 276 | Alberto Gianone | Nicasio Dominguez | |
| 2000 | Fabian Montovia | 266 | Nicolas Sedler | ||
| 1999 | 276 | Gonzalo Ramaciotti | |||
| 1998 | 279 | Ernesto Rivas | |||
| 1997 | 269 | Francisco Aleman | |||
| 1996 | Francisco Aleman | ||||
| 1995 | Daniel Lobos | Francisco Aleman | |||
| 1994 | Martin Travella | ||||
| 1993 | 268 | Gustavo Piovano | |||
| 1992 | Jorge Bollini | ||||
| 1991 | Fernando Chiesa | ||||
| 1990 | Fernando Chiesa | ||||
| 1989 | Fernando Chiesa | ||||
| 1988 | Fernando Chiesa | ||||
| 1987 | 256 | Diego Ventureira | |||
| 1986 | 272 | Carlos Melara | |||
| 1985 | 266 | Carlos Melara | |||
| 1984 | Norberto Fuentes | 275 | Luis Carbonetti | ||
| 1983 | 276 | Miguel Prado (amateur) | Miguel Prado | ||
| 1982 | |||||
| 1981 | Carlos Melara | ||||
| 1980 | No tournament | Carlos Melara | |||
| 1979 | No tournament | Carlos Melara | |||
| 1978 | Roberto De Vicenzo | 213 | Luis Daneri | ||
| 1977 | Juan Carlos Cabrera | ||||
| 1976 | Juan Quinteros | ||||
| 1975 | 279 | Juan Carlos Devoto | |||
| 1974 | 277 | Roberto Benito | |||
| 1973 | 268 | Juan Carlos Devoto | |||
| 1972 | 270 | Jorge Ledesma | |||
| 1971 | Orlando Tudino | 273 | Roberto Monguzzi | ||
| 1970 | 273 | Jorge Ledesma | |||
| 1969 | Juan Carlos Nuñez | 276 | Horacio Berthe | ||
| 1968 | Orlando Tudino | 280 | Jorge Ledesma | ||
| 1967 | 272 | Alfredo Vercelli | |||
| 1966 | 273 | Roberto Hume | |||
| 1965 | Elcido Nari* | 275 | Juan Querelos | Roberto Hume | |
| 1964 | Juan Querelos | 281 | Jorge Ledesma | ||
| 1963 | 284 | Juan Martinez | Jorge Ledesma | ||
| 1962 | 271 | Roberto Hume | |||
| 1961 | Juan Martinez | 281 | Jose Maria Gonzalez | Jorge Ledesma | |
| 1960 | 273 | Jorge Ledesma | |||
| 1959 | Esteban Sorolla | 275 | Roberto Hume | ||
| 1958 | Juan Querelos | 278 | Roberto Benito | ||
| 1957 | 271 | Carlos Brachts | |||
| 1956 | Enrique Bertolino | 278 | Martin Pose, Leopoldo Ruiz, Juan Martinez | Jorge Ledesma | |
| 1955 | 271 | Jorge Ledesma | |||
| 1954 | 276 | Juan Martinez | Juan Segura | ||
| 1953 | 278 | Juan Segura | |||
| 1952 | Juan Segura (amateur) | 275 | Juan Segura | ||
| 1951 | 273 | Roberto Hume | |||
| 1950 | 273 | Roberto Hume | |||
| 1949 | 274 | Carlos Brachts | |||
| 1948 | Arturo Soto* | 283 | Aurelio Castañon | Pedro Ledesma | |
| 1947 | 276 | Alberto Texier | |||
| 1946 | 273 | Carlos Menditegui | |||
| 1945 | 272 | A.R. Raggio | |||
| 1944 | 279 | Alberto Anchorena | |||
| 1943 | Eduardo Blasi | 272 | Pedro Ledesma | ||
| 1942 | 283 | Pedro Ledesma | |||
| 1941 | Emilio Serra | 274 | M. Ayesa | ||
| 1940 | 271 | Pedro Ledesma | |||
| 1939 | Juan Martinez | 281 | Alberto Anchorena | ||
| 1938 | 270 | A. Gainza Paz | |||
| 1937 | John Cruickshank | 279 | Hector Villamil | ||
| 1936 | John Cruickshank | 283 | Garnet Dunsmure (amateur) | Garnet Dunsmure | |
| 1935 | 275 | Carlos Mugica | |||
| 1934 | 277 | Alberto Anchorena | |||
| 1933 | 281 | Hector Villamil | |||
| 1932 | 277 | Aurelio Castañon | Hector Villamil | ||
| 1931 | 276 | Hector Villamil | |||
| 1930 | 287 | A. Gainza Paz | |||
| 1929 | 285 | Enrique Echague | |||
| 1928 | 292 | T. Sanderson | |||
| 1927 | 282 | Mariano Demaria Sala | |||
| 1926 | Andres Perez | 279 | Mariano Demaria Sala | ||
| 1925 | 288 | J.A. Brown | |||
| 1924 | A. Gainza Paz | ||||
| 1923 | Pedro Churio | No tournament | |||
| 1922 | Tomas Ockenden | No tournament | |||
| 1921 | Pedro Churio | No tournament | |||
| 1920 | Pedro Churio | No tournament | |||
| 1919 | Lagrima Goznalez | 293 | No tournament | ||
| 1918 | Juan Dentone | 289 | Juan Eustace | J. Brown, John May | |