The Golden Jubilee of Elizabeth II was the international celebration held in 2002 marking the 50th anniversary of the accession of Queen Elizabeth II on 6 February 1952. It was intended by the Queen to be both a commemoration of her 50 years as monarch and an opportunity for her to officially and personally thank her people for their loyalty.

Despite the deaths of her sister, Princess Margaret, and her mother, Queen Elizabeth The Queen Mother, in February and March 2002 respectively, and predictions in the media that the anniversary would be a non-event, the jubilee was marked with large-scale and popular events throughout London in June of the same year, bookended by events throughout the Commonwealth realms. Elizabeth attended all of the official celebrations as scheduled, along with her husband, Prince Philip, Duke of Edinburgh; over twelve months, the royal couple journeyed more than 40,000 miles (64,000 km) to the Caribbean, Australia, New Zealand, then around the United Kingdom, and wrapped up the jubilee year in Canada. Numerous landmarks, parks, buildings, and the like, were also named in honour of the golden jubilee and commemorative medals, stamps, and other symbols were issued.

There were six key themes of the Golden Jubilee celebrations: 'Celebration', 'Giving Thanks', 'Service', 'Involving the Whole Community', 'Looking Forward as Well as Back', and 'Commonwealth'.

In her Golden Jubilee message, the Queen said that "this anniversary is for us an occasion to acknowledge with gratitude the loyalty and support which we have received from so many people since I came to the Throne in 1952. It is especially an opportunity to thank all those of you who help others in your own local communities through public or voluntary service. I would like to think that your work will be particularly recognised during this Jubilee year. I hope also that this time of celebration in the United Kingdom and across the Commonwealth will not simply be an occasion to be nostalgic about the past. I believe that, young or old, we have as much to look forward to with confidence and hope as we have to look back on with pride".

As Queen of Australia, under your constitution, and as Head of the Commonwealth, I look forward to the coming few days here. I look around tonight and I am aware both of my responsibilities, and of the pleasure those responsibilities bring. And in this Golden Jubilee year, I cannot but reflect on the extraordinary opportunity I have been given to serve the people of this great country. The way Australia evolves over the next fifty years is in your hands.

The Royal Australian Mint released commemorative coins to mark the Queen's Golden Jubilee.

To mark her Golden Jubilee as Queen of Australia, Queen Elizabeth II toured the country. She was on 27 February received in Adelaide by the Governor-General, Peter Hollingworth; the Australian viceroy, at the time, was in the midst of controversy involving allegations of child abuse cover-ups in the Anglican Church and demonstrators were present when the Queen and Prince Philip landed. The royal couple undertook a five-day tour through South Australia and Queensland, which also coincided with that year's Commonwealth Heads of Government Meeting in Coolum Beach. On the Queen's Birthday holiday for 2002, services of thanksgiving were held in churches and a bonfire was lit during a party at the Governor-General's residence in Canberra.

Throughout the year, events were held across Canada to mark the Golden Jubilee, such as the Jubilee Levée held by Lieutenant Governor of Alberta Lois Hole, which was attended by more than 4,000 Albertans and at which Hole stated: "what we want to realize is how important the monarchy is to Canada and certainly to Alberta."