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.

1984 Delaware gubernatorial election

← 1980 November 6, 1984 1988 →

Nominee Mike Castle William T. Quillen Party Republican Democratic Popular vote 135,250 108,315 Percentage 55.53% 44.47%

County results House district results Castle:      50–60%      60–70%      70–80% Quillen:      50–60%      60–70%      80–90%

Governor before election Pierre S. duPont IV Republican Elected Governor Mike Castle Republican