The 12' Dinghy was a sailing event on the Sailing at the 1920 Summer Olympics program in Ostend and Amsterdam.

5 sailors, on 2 boats, from 1 nation entered.

The 1920 Olympic scoring system was used.

Legend: DNF – Did not finish; CAN – Race cancelled; During the Sailing regattas at the 1920 Summer Olympics among others the following persons were competing in the various classes: "Antwerp 1920".

International Olympic Committee.