Tillie Klimek (or Tillie Gburek) (1876 - 1936) was an American serial killer. She poisoned all five of her husbands: respectively, John Mitkiewicz, John Ruskowski, Frank Kupszcyk, Joseph Guszkowski, and Anton Klimek. She also poisoned three neighborhood children and others. She became known as a fortune-teller, for predicting their deaths in advance.