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.

[1] 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[2] and women[3] Complete results can be found on the "World Junior Athletics History" website.

[1] * = another source[1] rather states: Hexathlon *   Host nation (Paraguay)