1991 South American Championships in Athletics

The 36th South American Championships in Athletics were held in Manaus, Brazil, between 28 and 30 June 1991. It was the last edition to hold the Marathon event.

Participating nations

 * 🇦🇷 (26)
 * 🇧🇴 (9)
 * 🇧🇷 (72)
 * (29)
 * 🇨🇴 (22)
 * 🇪🇨 (24)
 * 🇵🇦 (1)
 * (2)
 * 🇵🇪 (39)
 * (7)
 * 🇻🇪 (26)