2003 South American Junior Championships in Athletics

The 35th South American Junior Championships in Athletics were held at the Estadio Modelo in Guayaquil, Ecuador from June 7–8, 2003.

Participation (unofficial)
Detailed result lists can be found on the "World Junior Athletics History" website. An unofficial count yields the number of about 230 athletes from about 12 countries: Argentina (21), Bolivia (4), Brazil (68), Chile (37), Colombia (20), Ecuador (34), Guyana (1), Panama (2), Paraguay (2), Peru (10), Uruguay (4), Venezuela (27).

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