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.

[1] Some nations such as Nigeria hold trials races to decide their teams, while others choose teams by selection.

[2] The event was formerly known as the NSSF World School Athletics Championship.