4 x 100 m Relay, Women
| Competition | 1966 South American Athletics U20 Championships |
|---|---|
| Venue |
Montevideo
 URU
|
| Held | — |
| Status | Medal |
| Competitors | 12 |
| Countries | 3 |
| Pos | Athlete(s) | Country | Mark | ||
|---|---|---|---|---|---|
| 🥇 | Chile |  CHI |
48.9 | ||
| Mabel Camprubi | — | ||||
| Cristina Miguel | — | ||||
| Montesinos | — | ||||
| Victoria Roa | — | ||||
| 🥈 | Argentina |  ARG |
49.0 | ||
| Alicia Masuccio | — | ||||
| Alba Oberti | — | ||||
| Graciela Pinto | — | ||||
| María Cristina Filgueira | — | ||||
| 🥉 | Brazil |  BRA |
49.0 | ||
| Eliana Leitão | — | ||||
| Matsukasa | — | ||||
| Adilia Do Rosário | — | ||||
| Silvina Pereira | — |