Agustín Pedro Justo Rolón was born 26 February 1876 in Concepción del Uruguay, Uruguay, Provincia de Entre Ríos, Argentina to Agustín Pedro Justo (1841-1896) and María Otilia Rolón (1854-1899) and died 11 January 1943 Ciudad de Buenos Aires, Provincia de Buenos Aires, Argentina of unspecified causes. He married Ana Encarnación Bernal (1878-1942) 1 December 1900 in Recoleta, Buenos Aires, Buenos Aires Province, Argentina.
Children
| Name | Birth | Death | Joined with |
| Liborio Agustín Justo (1902-2003) | |||
| Otilia Mercedes Justo (1903-1992) | |||
| Agustín Pedro Justo (1905-1910) | |||
| Horacio Justo (1906-1920) | |||
| Virginia Raquel Justo (1908-1993) | |||
| Eduardo Florencio Justo (1910-1938) | |||
| Elcira María Justo (1913-1914) | |||
Siblings