The 21st South American Junior Championships in Athletics were held in Montevideo, Uruguay, June 16–19, 1989.

[1] Detailed result lists can be found on the "World Junior Athletics History" website.

[2] An unofficial count yields the number of about 248 athletes from about 10 countries: Argentina (52), Bolivia (4), Brazil (59), Chile (30), Colombia (5), Ecuador (10), Paraguay (27), Peru (6), Uruguay (32), Venezuela (23).

Medal winners are published for men[3] and women[4] Complete results can be found on the "World Junior Athletics History" website.

[2] *   Host nation (Uruguay)