Horse Guards or horse guards can refer to:

• A Household Cavalry regiment:
  • Troops of the Horse Guards Regiment of the British Army from 1658 to 1788
  • The Royal Horse Guards, which is now part of the Blues and Royals
  • The Governor General's Horse Guards, the Household Cavalry regiment of the Canadian Forces
• Horse Guards (building), a building in Whitehall, London, formerly the headquarters of the British Army
  • Horse Guards Parade, the parade ground behind the building where the Trooping the Colour ceremony is held annually
  • Horse Guards Road, the road between the parade ground and St. James's Park
• Horse guard wasp, a North American sand wasp which eats horse flies