The South American U18 Championships in Athletics (Campeonato Sudamericano U18 de atletismo) is a biennial athletics eventorganized by "Confederación Sudamericana de Atletismo" (CONSUDATLE), the South American area association of the International Amateur Athletic Federation (IAAF). Starting in 1973, the competition was open for athletes under-17 in the early years. Since 2000 the international age group definition (under 18) has applied. Up until the 2016 edition the competition was known as the South American Youth Championships in Athletics. The tournament is open for athletes from CONSUDATLE member federations. Athletes from IAAF members of other geographical areas may be invited. However, they are not considered in the classification.