1984 Delaware gubernatorial election

The 1984 Delaware gubernatorial election took place on November 6, 1984. Incumbent Republican Governor Pierre S. duPont IV was barred from seeking a third term in office. Lieutenant Governor Mike Castle was elected to succeed him, defeating State Supreme Court Justice William T. Quillen. This was the last time that a gubernatorial nominee and a lieutenant gubernatorial nominee of different political parties were elected governor and lieutenant governor respectively in Delaware.