| IX South American Junior Championships in Athletics | |
| Size: | 200px |
| Host City: | Asunción, Paraguay  |
| Dates: | October 21–25 |
| Nations Participating: | 8 |
| Athletes Participating: | about 194 |
| Events: | 33 |
| Level: | Under-19 |
| Previous: | 1970 Cali |
| Next: | 1974 Lima |
The ninth South American Junior Championships in Athletics were held in Asunción, Paraguay from October 21–25, 1972.
Detailed result lists can be found on the "World Junior Athletics History" website. An unofficial count yields the number of about 194 athletes from about 8 countries: Argentina (40), Brazil (32), Chile (33), Colombia (22), Ecuador (6), Paraguay (24), Peru (22), Uruguay (15).
Medal winners are published for men and womenComplete results can be found on the "World Junior Athletics History" website.
| 100 metres | 10.9 | 11.1 | 11.1 | ||||
| 200 metres | 22.4 | 22.5 | 22.5 | ||||
| 400 metres | 49.8 | 50.6 | 50.9 | ||||
| 800 metres | 1:58.6 | 1:59.3 | 2:00.2 | ||||
| 1500 metres | 4:04.1 | 4:05.1 | 4:05.7 | ||||
| 3000 metres | 8:58.6 | 9:05.2 | 9:08.7 | ||||
| 110 metres hurdles | 16.3 | 16.5 | 16.6 | ||||
| 400 metres hurdles | 53.9 | 57.5 | 58.6 | ||||
| 1500 metres steeplechase | 4:31.6 | 4:34.9 | 4:35.1 | ||||
| 4 × 100 metres relay | 43.3 | 43.4 | 43.9 | ||||
| 4 × 400 metres relay | 3:26.3 | 3:28.6 | 3:31.3 | ||||
| High jump | 1.90 | 1.85 | 1.80 | ||||
| Pole vault | 4.00 | 3.70 | 3.70 | ||||
| Long jump | 6.90 | 6.84 | 6.50 | ||||
| Triple jump | 14.67 | 14.07 | 13.98 | ||||
| Shot put | 14.29 | 14.13 | 13.33 | ||||
| Discus throw | 42.62 | 38.62 | 36.46 | ||||
| Hammer throw | 53.20 | 48.28 | 46.72 | ||||
| Javelin throw | 55.64 | 53.24 | 53.20 | ||||
| Pentathlon | 3653 | 3518 | 3460 |
| 100 metres | 12.5 | 12.7 | 13.0 | ||||
| 200 metres | 25.5 | 25.8 | 26.2 | ||||
| 400 metres | 59.4 | 59.5 | 59.6 | ||||
| 800 metres | 2:21.0 | 2:23.5 | 2:23.6 | ||||
| 100 metres hurdles | 15.0 | 16.0 | 16.0 | ||||
| 4 × 100 metres relay | 49.4 | 49.4 | 49.9 | ||||
| 4 × 400 metres relay | 4:08.0 | 4:11.5 | 4:19.7 | ||||
| High jump | 1.60 | 1.50 | 1.45 | ||||
| Long jump | 5.86 | 5.63 | 5.42 | ||||
| Shot put | 12.28 | 11.37 | 10.84 | ||||
| Discus throw | 36.28 | 33.70 | 32.20 | ||||
| Javelin throw | 35.14 | 34.20 | 34.18 | ||||
| Pentathlon | 3432 | 2957 | 2947 |