The 1st South American Under-23 Championships in Athletics were held in Barquisimeto, Venezuela, at the Polideportivo Máximo Viloria on June 26–27, 2004.

[1] A total of 310 athletes from 13 countries were announced to participate:[1] Argentina (29),[2] Bolivia (5), Brazil (84), Chile (43), Colombia (36), Ecuador (24), Guyana (4), Panamá (2), Paraguay (3), Perú (5), Surinam (2), Uruguay (6), Venezuela (68).

[3] In addition, one source also lists results from 4 athletes representing Saint Kitts and Nevis.

[4] Just as pole vaulter Keisa Monterola, she might have started out of competition because of her age (she was then only 17 years old).

*   Host nation (Venezuela)The final scoring per country for the team trophy was published.