The Diamond Jubilee of Queen Elizabeth II is the international celebration throughout 2012 marking the 60th anniversary of the accession of Queen Elizabeth II to the thrones of seven countries upon the death of her father, King George VI, on 6 February 1952. She is today queen regnant of 16 sovereign states, 12 of which were British colonies or Dominions at the start of her reign.

Queen Victoria in 1897 is the only other monarch in the histories of the United Kingdom, Canada, Australia and a few other Commonwealth realms to have celebrated a Diamond Jubilee. Following the tradition of jubilees past, a Diamond Jubilee medal is being awarded in various countries and holidays and events will be held throughout the Commonwealth. Plans were discussed at the Commonwealth Heads of Government Meeting 2011.