The World School Athletics Championship is a sport of athletics international championship for under-18 athletes, part of the International School Sport Federation ISF World Schools Championships. With some exceptions, it has been held on a biennial basis since its inception in 1971.
Athletes are represented by both their school and their country. Some nations such as Nigeria hold trials races to decide their teams, while others choose teams by selection. The event was formerly known as the NSSF World School Athletics Championship.
The championships have been held 26 times since 1973.