A
| Senator | Years | Province | Party |
|---|---|---|---|
| Elías Abad | 1942 - 1943 | Corrientes | |
| Demetrio César Abdala | 1963 - 1966 | La Rioja | |
| Felipe Abdala | 1963 - 1966 | Mendoza | UCRP |
| Jacobo Abrameto | 2007 - 2007 | Río Negro | Radical Civic Union |
| Aurelio Acuña | 1942 - 1943 | Catamarca | National Democrat |
| Ernesto Niceo Acuña | 1963 - 1966 | Catamarca | UCRP |
| Ramón Edgardo Acuña | 1963 - 1966 | Catamarca | UCRP |
| Américo Aguiar Vázquez | 1963 - 1966 | San Juan | UCRP |
| Carlos Aguinaga | 1966 - 1966 | Mendoza | Democratic Party of Mendoza |
| Jorge Agundez | 1995 - 2005 | San Luis | Radical Civic Union |
| Augusto Alasino | 1992 - 2001 | Entre Ríos | Justicialist Party |
| Ramón Albariño | 1952 - 1955 | Entre Ríos | |
| Alejandro Albarracín | 1992 - 2001 | Entre Ríos | Justicialist Party |
| Martín Albarracín | 1913 - 1922 | San Juan | Conservative |
| Leandro Alem | 1891 - 1892 1893 |
Buenos Aires City | Radical Civic Union |
| Raúl Alfonsín | 2001 - 2002 | Buenos Aires | Radical Civic Union |
| José Antonio Allende | 1973 - 1976 | Córdoba | Frejuli |
| Ramón Almendra | 1983 - 1986 | Santa Cruz | Justicialist Party |
| Carlos Almirón | 1995 - 1999 | Tucumán | Republican Force Tucumán |
| José Alperovich | 2001 - 2003 | Tucumán | Justicialist Party |
| Valentín Alsina | 1862 - 1868 | Buenos Aires | Buenos Aires Autonomist |
| Juan Carlos Altuna | 1998 - 2001 | Chubut | Radical Civic Union |
| Ramón Alvarado | 1855 - 1861 | Jujuy | |
| Sergio Alvarado | 1904 - 1910 | Jujuy | |
| Antenor Álvarez | 1909 - 1910 | Santiago del Estero | |
| Eduardo Angeloz | 1973 - 1976 1995 - 2001 |
Córdoba | Radical Civic Union |
| Rodolfo Angulo | 1952 - 1955 | Catamarca | |
| Armando Antille | 1924 - 1930 1946 - 1952 |
Santa Fe | |
| Atilio Antinucci | 1953 - 1955 | Córdoba | |
| Castulo Aparicio | 1895 - 1904 | Jujuy | |
| Tomás Arana | 1958 - 1962 | Buenos Aires | Radical Civic Union |
| Alberto Arancibia Rodríguez | 1932 - 1943 | San Luis | National Democrat |
| Lylia Arancio de Beller | 2001 - 2005 | Jujuy | Radical Civic Union |
| Daniel Araoz | 1868 - 1874 | Jujuy | |
| Ramón Araujo | 1983 - 1985 | Tucumán | Justicialist Party |
| Mario Arenas | 1932 - 1941 | Mendoza | National Democrat |
| Aureliano Argento | 1876 - 1883 | Santa Fe | |
| Fenando Arias | 1857 - 1861 | Salta | |
| José Manuel Arias | 1860 - 1861 1869 - 1880 |
Salta | |
| Tomás Arias | 1857 - 1861 | Salta | |
| Eduardo Arnold | 1998 - 2001 | Santa Cruz | Justicialist Party |
| Alfredo Arrieta | 1946 - 1950 | Buenos Aires | |
| Herminio Arrieta | 1838 - 1943 | Jujuy | National Democrat |
| Félix Astudillo | 1963 - 1966 | Santa Fe | Intransigent Radical Civic Union |
| Pedro Avalos | 1973 - 1976 | Misiones | Frejuli |
| Alfredo Avelín | 1992 - 1999 | San Juan | Renewal Crusade of San Juan |
| Nancy Avelín de Ginestar | 2001 - 2005 | San Juan | Renewal Crusade of San Juan |
| Lidoro Avellaneda | 1898 - 1907 | La Rioja | |
| Marco Avellaneda | 1910 - 1911 | Buenos Aires City | |
| Nicolás Avellaneda | 1874 1883 - 1885 |
Tucumán | |
| Arcadio Avendaño | 1946 - 1952 | Santiago del Estero | |
| Alberto Aybar Augier | 1921 - 1928 | Tucumán | |
| Moisés Azar | 1961 - 1962 | Formosa |
Read more about this topic: List Of Former Argentine Senators