The 420 World Championships is an annual international sailing regattas in the 420 class organized by the International 420 Class Association and recognised by World Sailing.
They have been held every year since 1973 the year in which the class gained status from World Sailing.
The 420 Team Racing World Championship is an sailing regattas in the 420 class organized by the International 420 Class Association and recognised by World Sailing.
The 420 (dinghy) has also been used in Youth Sailing World Championships Formerly (IYRU Youth World, ISAF Youth Worlds) and the IYRU Women's Sailing World Championships and in Team Racing World Championships.