The 37th South American Junior Championships in Athletics (Campeonatos Sudamericanos de Atletismo de Juveniles) were held at the Estádio Ícaro de Castro Melo in São Paulo, Brazil from June 30-July 1, 2007.

The Champions for men's 10,000m, both Race Walking and Combined Events were extracted from the classification of the 2007 Pan American Junior Athletics Championships held at the same site one week later from July 6 to July 8, 2007.

[2] Best performances were the two South American Junior records by Alonso Edward from Panamá in 10.28s in the men's 100m competition, and Jorge McFarlane from Perú who achieved 13.76s (0.0 m/s) in the first heat in 110m hurdles men.

[4] An unofficial count yields the number of about 224 athletes from about 12 countries: Argentina (20), Bolivia (3), Brazil (72), Chile (34), Colombia (28), Ecuador (17), Guyana (3), Panama (3), Paraguay (9), Peru (10), Uruguay (2), Venezuela (23).

The trophies for the most outstanding performance were awarded to Juan Pablo Maturana (Colombia), gold medalist in the men's 400m, 400m hurdles, and 4 × 100 m relay events, and to Giselle Marcolino de Albuquerque (Brazil), gold medalist in the women's 100m hurdles and triple jump events.