| Host City | Comodore Rivadavia |
|---|---|
| Country | |
| Held | 17 – 19 October 1986 |
| Competitors | 75 |
| Countries | 8 |
| Event | Gender | Held | Status | Competitors | Countries |
|---|---|---|---|---|---|
| 100 m | Men | — | Medal | 3 | 2 |
| 200 m | Men | — | Medal | 3 | 3 |
| 400 m | Men | — | Medal | 3 | 2 |
| 800 m | Men | — | Medal | 3 | 3 |
| 1,500 m | Men | — | Medal | 3 | 2 |
| 3,000 m | Men | — | Medal | 3 | 3 |
| 110 m Hurdles | Men | — | Medal | 3 | 2 |
| 300 m Hurdles | Men | — | Medal | 3 | 2 |
| 1,500 m Steeplechase | Men | — | Medal | 3 | 2 |
| 4 x 100 m Relay | Men | — | Medal | 0 | 3 |
| 4 x 400 m Relay | Men | — | Medal | 4 | 3 |
| High Jump | Men | — | Medal | 3 | 2 |
| Pole Vault | Men | — | Medal | 3 | 2 |
| Long Jump | Men | — | Medal | 3 | 2 |
| Triple Jump | Men | — | Medal | 3 | 2 |
| Shot Put | Men | — | Medal | 3 | 3 |
| Discus Throw | Men | — | Medal | 3 | 2 |
| Hammer Throw | Men | — | Medal | 3 | 2 |
| Javelin Throw | Men | — | Medal | 3 | 3 |
| Hexathlon | Men | — | Medal | 3 | 2 |
| 100 m | Women | — | Medal | 3 | 2 |
| 200 m | Women | — | Medal | 3 | 2 |
| 400 m | Women | — | Medal | 3 | 3 |
| 800 m | Women | — | Medal | 3 | 2 |
| 1,500 m | Women | — | Medal | 3 | 2 |
| 100 m Hurdles | Women | — | Medal | 3 | 3 |
| 4 x 100 m Relay | Women | — | Medal | 0 | 3 |
| 4 x 400 m Relay | Women | — | Medal | 0 | 3 |
| High Jump | Women | — | Medal | 3 | 2 |
| Long Jump | Women | — | Medal | 3 | 3 |
| Shot Put | Women | — | Medal | 3 | 2 |
| Discus Throw | Women | — | Medal | 3 | 3 |
| Javelin Throw | Women | — | Medal | 3 | 3 |
| Pentathlon | Women | — | Medal | 3 | 3 |
| Pos | Country | 🥇 Gold | 🥈 Silver | 🥉 Bronze | Total | |
|---|---|---|---|---|---|---|
| 1 | Brazil | 18 | 12 | 11 | 41 | |
| 2 | Argentina | 13 | 8 | 9 | 30 | |
| 3 | Venezuela | 2 | 1 | 1 | 4 | |
| 4 | Chile | 1 | 6 | 5 | 12 | |
| 5 | Paraguay | 0 | 3 | 1 | 4 | |
| = | Peru | 0 | 3 | 1 | 4 | |
| 7 | Bolivia | 0 | 1 | 1 | 2 | |
| 8 | Uruguay | 0 | 0 | 5 | 5 | |