The Constable and Governor of Windsor Castle is in charge of Windsor Castle in England on behalf of the sovereign. The day-to-day operations are under the Superintendent, who is an officer of the Master of the Household's Department of the Royal Household.

The Military Knights of Windsor, originally the Alms Knights and informally the Poor Knights, are retired military officers who receive a pension and accommodation at Windsor Castle, and who provide support for the Order of the Garter and for the services of St. George's Chapel, Windsor Castle. They are commanded by a senior retired officer as Governor of the Military Knights of Windsor.