Lăcătuș or Lăcătușu is an occupational Romanian surname that means locksmith. It may refer to Izabela Lăcătuș (born 1976), Romanian artistic and aerobic gymnast Marius Lăcătuș (born 1964), Romanian football player Mihaela Lăcătuș (born 1981), Romanian boxer Constantin Lăcătușu (born 1961), Romanian mountain climber