Bulstrode is the surname of a wizarding family. They used to be pure-blood and one of the Sacred Twenty-Eight, but more recent members, such as Millicent Bulstrode, are half-bloods, suggesting that one or multiple members of the Bulstrode family had Muggle or Muggle-born spouses. They are distantly related to the Blacks, the Flints, the Crabbes and the Potters.