Under 23 is a category of athletics in which athletes compete under from 20 to 22 years on 31 December of the year of the competition.
- European Athletics U23 Championships, organized by the EAA every 2 years
- NACAC Under-23 Championships in Athletics
- South American Under-23 Championships in Athletics
- "EUROPEAN ATHLETICS UNDER 23 CHAMPIONSHIPS" (PDF). european-athletics.org. Retrieved 31 January 2013.