This is a complete list of the children, grandchildren, great-grandchildren and great-great-grandchildren of King George V, the founder of the House of Windsor, and his queen Mary of Teck. The list includes deceased members, members who have become Catholic, royal and non-royal, legitimate and illegitimate members openly acknowledged by their parents.

The House of Windsor is a British royal house, and currently the reigning house of the United Kingdom and the other Commonwealth realms. The royal house's name was inspired by the historic Windsor Castle estate. Since it was founded in 1917, there have been five British monarchs of the House of Windsor: George V, Edward VIII, George VI, Elizabeth II, and Charles III. The children and male-line descendants of Queen Elizabeth II and Prince Philip also genealogically belong to the House of Oldenburg since Philip was by birth a member of the Glücksburg branch of that house.