The 40th South American Junior Championships in Athletics (Spanish: Campeonatos Sudamericanos de Atletismo de Juveniles) were held from October 18–20, 2013 at the Estadio Jaime Zapata in Resistencia, Chaco, Argentina.

[2] †: In the 400 metres hurdles event, Gerald Drummond from  Costa Rica was 3rd in 53.74, running as a guest.

[3] There is a slight difference to an unofficial medal count.

However, another source supports the number of 7 gold medals for Colombia as published below.

[4] *   Host nation (Argentina) Team scores were published.