The 1986 Maryland gubernatorial election was held on November 4, 1986. Democratic nominee William Donald Schaefer defeated Republican nominee Thomas J. Mooney with 82.37% of the vote. To date this is the largest percentage total ever for a contested statewide election in Maryland.
As of November, 2025, this is the last time a candidate from either party carried every county in a gubernatorial election, and the last time the Democratic candidate won a majority of counties in a gubernatorial election. He is also the last Democrat to win the following counties: Garrett, Washington, Carroll, Queen Anne's, Caroline, Dorchester, Wicomico, and Somerset. Anne Arundel County, Frederick County, Kent County, and Talbot County would not vote Democratic again until 2022.
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Text from the Wikipedia article “1986 Maryland gubernatorial election”, available under CC BY-SA 4.0.