Pierre S. duPont IV Republican Mike Castle Republican 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.

This Delaware elections-related article is a stub.