2018 Jefferson County, Missouri Executive election

2018 Jefferson County, Missouri Executive election
	November 6, 2018
County Executive before election; Ken Waller; Republican	Elected County Executive ; Dennis Gannon; Republican

The 2018 Jefferson County, Missouri Executive election took place on November 6, 2018. Incumbent County Executive Ken Waller declined to run for re-election to a third term, instead opting to run for County Clerk.^[1] Businessman Dennis Gannon, the former President of the County Port Authority, won the Republican primary over sheriff's deputy Gary Stout, and faced former State Representative Jeff Roorda, the Democratic nominee, in the general election. Gannon defeated Roorda by a wide margin, winning 58 percent of the vote.

Democratic primary

Candidates

Jeff Roorda, former State Representative^[2]

Results

Democratic primary results^[3]
Party		Candidate	Votes	%
	Democratic	Jeff Roorda	19,572	100.00%
Total votes			19,572	100.00%

Republican primary

Candidates

Dennis Gannon, businessman, former President of the Jefferson County Port Authority^[4]
Gary Stout, county sheriff's deputy, businessman, 2014 Democratic candidate for County Executive^[4]

Results

Republican primary results^[3]
Party		Candidate	Votes	%
	Republican	Dennis Gannon	16,940	65.61%
	Republican	Gary Stout	8,879	34.39%
Total votes			25,819	100.00%

General election

Results

2018 Jefferson County Executive election^[5]
Party		Candidate	Votes	%
	Republican	Dennis Gannon	50,713	58.34%
	Democratic	Jeff Roorda	36,220	41.66%
Total votes			86,933	100.00%
	Republican hold

References

^ Thorsen, Leah (July 21, 2018). "After months of tumult in Jefferson County, voters will choose new leader". St. Louis Post-Dispatch. St. Louis, Missouri. Retrieved July 21, 2025.
^ Herndon Dunn, Rachael (February 8, 2018). "Roorda ups ante in JeffCo executive race on heels of Revis win". The Missouri Times. Retrieved July 21, 2025.
^ ^a ^b "Election Summary Report - PRIMARY ELECTION - AUGUST 7, 2018 - JEFFERSON COUNTY, MISSOURI - August 7, 2018 Primary". Jefferson County Clerk. August 13, 2018. Retrieved July 17, 2025.
^ ^a ^b "JEFFERSON COUNTY EXECUTIVE: Two Republicans seek bid to become county's next leader". Leader Publications. Festus, Missouri. July 26, 2018. Retrieved July 21, 2025.
^ "Election Summary Report - GENERAL ELECTION - NOVEMBER 6, 2018 - JEFFERSON COUNTY, MISSOURI - November 6, 2018 General - Official Election Results". Jefferson County Clerk. 2018. Retrieved July 17, 2025.

[1] Thorsen, Leah (July 21, 2018). "After months of tumult in Jefferson County, voters will choose new leader". St. Louis Post-Dispatch. St. Louis, Missouri. Retrieved July 21, 2025.

[2] Herndon Dunn, Rachael (February 8, 2018). "Roorda ups ante in JeffCo executive race on heels of Revis win". The Missouri Times. Retrieved July 21, 2025.

[primary_results-3] "Election Summary Report - PRIMARY ELECTION - AUGUST 7, 2018 - JEFFERSON COUNTY, MISSOURI - August 7, 2018 Primary". Jefferson County Clerk. August 13, 2018. Retrieved July 17, 2025.

[two_Republicans-4] "JEFFERSON COUNTY EXECUTIVE: Two Republicans seek bid to become county's next leader". Leader Publications. Festus, Missouri. July 26, 2018. Retrieved July 21, 2025.

[5] "Election Summary Report - GENERAL ELECTION - NOVEMBER 6, 2018 - JEFFERSON COUNTY, MISSOURI - November 6, 2018 General - Official Election Results". Jefferson County Clerk. 2018. Retrieved July 17, 2025.

[1]

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