The 2018 South American Junior Championships were held from October 17 through October 21 in Lima, Peru.
All-Around Results
| Rank | Athlete | Nation | FX | PH | SR | VT | PB | HB | AA |
| 1 | Sergio Vargas | Colombia | 12.950 | 11.950 | 12.550 | 13.100 | 12.850 | 12.850 | 76.250 |
| 2 | Daniel Alarcon | Peru | 13.100 | 13.100 | 12.100 | 13.100 | 12.900 | 11.750 | 76.050 |
| 3 | Patrick Sampaio | Brazil | 12.850 | 11.750 | 12.650 | 13.150 | 11.850 | 12.350 | 74.600 |
| 4 | Edwar Gonzales | Peru | 12.550 | 12.750 | 11.500 | 13.100 | 13.000 | 11.550 | 74.450 |
| 5 | Mateus Neves da Silva | Brazil | 12.050 | 12.150 | 12.050 | 13.000 | 12.900 | 12.200 | 74.350 |
| 6 | Cesar Armando Lopez | Ecuador | 11.850 | 12.250 | 12.350 | 13.650 | 11.950 | 12.150 | 74.200 |
| — | Lucas Costa | Brazil | 12.850 | 11.750 | 12.450 | 13.200 | 12.800 | 10.600 | 73.650 |
| 7 | Enzo Barrionuevo | Argentina | 12.300 | 10.800 | 12.650 | 13.100 | 12.150 | 12.400 | 73.400 |
| 8 | Jefferson Medina | Colombia | 12.950 | 11.850 | 10.750 | 12.900 | 13.150 | 11.750 | 73.350 |
| 9 | Santiago Gomez | Argentina | 12.800 | 10.600 | 11.150 | 13.100 | 12.250 | 12.900 | 72.800 |
| — | Franco Celayes | Argentina | 12.450 | 11.450 | 12.200 | 12.450 | 11.850 | 11.850 | 72.250 |
| — | Tales da Silva | Brazil | 12.900 | 10.600 | 11.650 | 12.750 | 12.100 | 11.500 | 71.500 |
| 10 | Josue Armijo | Chile | 12.200 | 10.700 | 11.550 | 13.150 | 12.100 | 11.350 | 71.050 |
| 11 | Luciano Letelier | Chile | 12.350 | 11.000 | 11.600 | 11.950 | 12.000 | 12.100 | 71.000 |
| 12 | Christopher Briones | Ecuador | 11.950 | 10.750 | 11.950 | 13.050 | 11.200 | 11.650 | 70.550 |
| — | Agustin Lira | Chile | 12.150 | 10.350 | 11.650 | 12.400 | 11.850 | 11.900 | 70.300 |
| — | Patrick Cardicel | Peru | 11.600 | 10.700 | 10.900 | 13.050 | 12.100 | 11.700 | 70.050 |
| — | Rafael Miranda | Chile | 12.050 | 10.350 | 11.650 | 12.000 | 12.300 | 11.450 | 69.800 |
| — | Joan Leonardo Pilay | Ecuador | 12.250 | 10.350 | 12.150 | 12.950 | 11.300 | 10.800 | 69.800 |
| — | Pablo Calvache | Ecuador | 10.600 | 10.900 | 12.550 | 11.950 | 12.600 | 10.950 | 69.550 |
| — | Eydrian Ramos | Peru | 10.750 | 12.000 | 10.550 | 11.050 | 11.650 | 10.850 | 66.850 |
| — | Luca Alfieri | Argentina | 12.900 | 12.400 | 9.950 | 11.650 | 11.850 | —— | 58.750 |
| 13 | Fabian Peña | Bolivia | 10.400 | 4.700 | 9.600 | 10.800 | 10.200 | 10.200 | 55.900 |
| — | Cristian Henao | Colombia | —— | 5.400 | 10.600 | 11.000 | 10.700 | 11.200 | 48.900 |
Floor Final Results
| Rank | Athlete | Nation | Total |
| 1 | Tales da Silva | Brazil | 13.167 |
| 2 | Sergio Vargas | Colombia | 13.067 |
| 3 | Santiago Gomez | Argentina | 13.000 |
| 4 | Lucas Costa | Brazil | 12.967 |
| 5 | Daniel Alarcon | Peru | 12.867 |
| 6 | Luca Alfieri | Argentina | 12.867 |
| 7 | Jefferson Medina | Colombia | 12.667 |
| 8 | Edwar Gonzales | Peru | 11.800 |
Pommels Final Results
| Rank | Athlete | Nation | Total |
| 1 | Jefferson Medina | Colombia | 13.033 |
| 2 | Daniel Alarcon | Peru | 12.833 |
| 3 | Mateus Neves da Silva | Brazil | 12.700 |
| 4 | Cesar Armando Lopez | Ecuador | 12.600 |
| 5 | Luca Alfieri | Argentina | 12.533 |
| 6 | Sergio Vargas | Colombia | 12.433 |
| 7 | Edwar Gonzales | Peru | 11.900 |
| 8 | Lucas Costa | Brazil | 11.533 |
Rings Final Results
| Rank | Athlete | Nation | Total |
| 1 | Patrick Sampaio | Brazil | 13.133 |
| 2 | Lucas Costa | Brazil | 12.600 |
| 3 | Enzo Barrionuevo | Argentina | 12.433 |
| 4 | Sergio Vargas | Colombia | 12.333 |
| 5 | Cesar Armando Lopez | Ecuador | 12.200 |
| 6 | Daniel Alarcon | Peru | 12.133 |
| 7 | Franco Celayes | Argentina | 12.100 |
| 8 | Pablo Calvache | Ecuador | 11.867 |
Vault Final Results
| Rank | Athlete | Nation | Average |
| 1 | Joan Leonardo Pilay | Ecuador | 13.534 |
| 2 | Franco Celayes | Argentina | 13.283 |
| 3 | Cesar Armando Lopez | Ecuador | 13.200 |
| 4 | Enzo Barrionuevo | Argentina | 12.767 |
| 5 | Tales da Silva | Brazil | 12.750 |
| 6 | Edwar Gonzales | Peru | 12.684 |
| 7 | Josue Armijo | Chile | 12.350 |
| 8 | Agustin Lira | Chile | 11.583 |
P-Bars Final Results
| Rank | Athlete | Nation | Total |
| 1 | Edwar Gonzales | Peru | 12.967 |
| 2 | Daniel Alarcon | Peru | 12.900 |
| 3 | Jefferson Medina | Colombia | 12.833 |
| 4 | Sergio Vargas | Colombia | 12.667 |
| 5 | Pablo Calvache | Ecuador | 12.433 |
| 6 | Lucas Costa | Brazil | 12.367 |
| 7 | Mateus Neves da Silva | Brazil | 12.267 |
| 8 | Rafael Miranda | Chile | 11.233 |
High Bar Final Results
| Rank | Athlete | Nation | Total |
| 1 | Mateus Neves da Silva | Brazil | 13.067 |
| 2 | Sergio Vargas | Colombia | 12.933 |
| 3 | Cesar Armando Lopez | Ecuador | 12.800 |
| 4 | Luciano Letelier | Chile | 11.967 |
| 5 | Agustin Lira | Chile | 11.800 |
| 6 | Patrick Sampaio | Brazil | 11.400 |
| 7 | Santiago Gomez | Argentina | 11.167 |
| 8 | Enzo Barrionuevo | Argentina | 8.867 |
Team Final Results
| Rank | Nation | Total |
| 1 | BRAZIL (Lucas Costa, Tales da Silva, Mateus Neves da Silva, Patrick Sampaio) | 224.600 |
| 2 | PERU (Daniel Alarcon, Patrick Cardicel, Edwar Gonzales, Eydrian Ramos) | 221.850 |
| 3 | ARGENTINA (Luca Alfieri, Enzo Barrionuevo, Franco Celayes, Santiago Gomez) | 220.900 |
| 4 | ECUADOR (Christopher Briones, Pablo Calvache, Cesar Armando Lopez, Joan Leonardo Pilay) | 217.350 |
| 5 | COLOMBIA (Cristian Henao, Jefferson Medina, Sergio Vargas) | 215.450 |
| 6 | CHILE (Josue Armijo, Luciano Letelier, Agustin Lira, Rafael Miranda) | 213.050 |
The Gymternet 