World Rowing U23 Championships is an international rowing regatta organized by the World Rowing Federation. Rowers can compete in U23 events until December 31 of the year that they turn 22. The World Rowing U23 Championship is just under a week long and consists of a progression system to advance from heats to finals. The regatta has 22 boat classes, which includes the 8 lightweight boat classes.

From 1976, the U23 event was organised as the Nations Cup, independently from FISA. In 2002, it became the World Rowing U23 Regatta, before becoming the Championships in 2005.