The 2003 South American Cross Country Championships took place on February 22–23, 2003.

The races were held at the Circuito de Ñu Guazú in Asunción, Paraguay.

[1] Complete results,[1][2][3] results for junior and youth competitions,[4] and medal winners[5] were published.

*   Host nation (Paraguay)According to an unofficial count, 95 athletes from 8 countries participated.