Missouri State Senate District 3

Next vote Tue, Nov 3, 2026 · Represented by Mike Henderson Republican · Member list as of Oct 28

This seat has no race on the official 2026 list.

Last election: Mike Henderson (Republican) won by 51.7 points, 2024

More about this seat

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Official results for Missouri

History (15 elections for this seat)

Missouri Senate District 3, 1968 to 2024, 2024, every candidate
Candidate	Party	Votes and share	Share
RepublicanMike HendersonWon	Republican	60,54875.8%	75.8%
DemocraticDoug Halbert	Democratic	19,27324.1%	24.1%

Missouri Senate District 3, 1968 to 2024, 2020, every candidate
Candidate	Party	Votes and share	Share
RepublicanElaine Freeman GannonWon	Republican	65,686100.0%	100.0%

Votes for listed candidates: 66,969
Election day: November 8, 2016
District map: Older district map (2012 to 2021)

Missouri Senate District 3, 1968 to 2024, 2016, every candidate
Candidate	Party	Votes and share	Share
RepublicanGary RomineWon(incumbent)	Republican	54,41481.3%	81.3%
GreenEdward R. Weissler	Green	12,55518.8%	18.8%

Votes for listed candidates: 65,719
Election day: November 6, 2012
District map: Older district map (2012 to 2021)

Missouri Senate District 3, 1968 to 2024, 2012, every candidate
Candidate	Party	Votes and share	Share
RepublicanGary RomineWon	Republican	35,38453.8%	53.8%
DemocraticJoseph Fallert Jr.	Democratic	30,33546.2%	46.2%

Votes for listed candidates: 72,468
Election day: November 4, 2008
District map: Older district map (2002 to 2011)

Missouri Senate District 3, 1968 to 2024, 2008, every candidate
Candidate	Party	Votes and share	Share
RepublicanKevin EnglerWon(incumbent)	Republican	42,55158.7%	58.7%
DemocraticDennis Riche	Democratic	29,91741.3%	41.3%

Missouri Senate District 3, 1968 to 2024, 2004, every candidate
Candidate	Party	Votes and share	Share
RepublicanKevin EnglerWon	Republican	34,76751.0%	51.0%
DemocraticDan Ward	Democratic	33,34849.0%	49.0%

Votes for listed candidates: 57,369
Election day: November 7, 2000
District map: Older district map (1992 to 2001)

Missouri Senate District 3, 1968 to 2024, 2000, every candidate
Candidate	Party	Votes and share	Share
DemocraticJohn E. ScottWon(incumbent)	Democratic	36,72864.0%	64.0%
RepublicanLeonard F. Arons	Republican	17,35430.3%	30.3%
OtherMary A. Auer	Other	3,2875.7%	5.7%

Votes for listed candidates: 56,464
Election day: November 5, 1996
District map: Older district map (1992 to 2001)

Missouri Senate District 3, 1968 to 2024, 1996, every candidate
Candidate	Party	Votes and share	Share
DemocraticJohn E. ScottWon(incumbent)	Democratic	36,93965.4%	65.4%
RepublicanLeonard F. Arons	Republican	17,97031.8%	31.8%
OtherRon Levy	Other	1,5552.8%	2.8%

Votes for listed candidates: 61,176
Election day: November 3, 1992
District map: Older district map (1992 to 2001)

Missouri Senate District 3, 1968 to 2024, 1992, every candidate
Candidate	Party	Votes and share	Share
DemocraticJohn E. ScottWon(incumbent)	Democratic	52,74786.2%	86.2%
LibertarianStephen O. Schaper	Libertarian	8,42913.8%	13.8%

Votes for listed candidates: 54,038
Election day: November 8, 1988
District map: Older district map (1982 to 1991)

Missouri Senate District 3, 1968 to 2024, 1988, every candidate
Candidate	Party	Votes and share	Share
DemocraticJohn E. ScottWon(incumbent)	Democratic	35,46965.6%	65.6%
RepublicanJoan F. Lang	Republican	18,56934.4%	34.4%

Missouri Senate District 3, 1968 to 2024, 1984, every candidate
Candidate	Party	Votes and share	Share
DemocraticJohn E. ScottWon(incumbent)	Democratic	47,955100.0%	100.0%

Votes for listed candidates: 50,523
Election day: November 4, 1980
District map: Older district map (1972 to 1981)

Missouri Senate District 3, 1968 to 2024, 1980, every candidate
Candidate	Party	Votes and share	Share
DemocraticJohn E. ScottWon(incumbent)	Democratic	36,10271.5%	71.5%
RepublicanOrville Berg	Republican	14,42128.5%	28.5%

Missouri Senate District 3, 1968 to 2024, 1976, every candidate
Candidate	Party	Votes and share	Share
DemocraticJohn E. ScottWon	Democratic	34,433100.0%	100.0%

Missouri Senate District 3, 1968 to 2024, 1972, every candidate
Candidate	Party	Votes and share	Share
DemocraticLawrence J. LeeWon(incumbent)	Democratic	36,685100.0%	100.0%

Votes for listed candidates: 34,146
Election day: November 5, 1968
District map: Older district map (1966 to 1971)

Missouri Senate District 3, 1968 to 2024, 1968, every candidate
Candidate	Party	Votes and share	Share
DemocraticLawrence J. LeeWon(incumbent)	Democratic	23,09467.6%	67.6%
RepublicanEleanor S. Waite	Republican	11,05232.4%	32.4%

2024: MEDSL 2024 official precinct returns (individual_states zips), retrieved Oct 28, 2026. Compiled by MIT Election Data and Science Lab (MEDSL) from official returns; not an official source
1968 to 2020: State Legislative Election Returns, 1967-2022 (Carl Klarner, Harvard Dataverse), retrieved Oct 28, 2026. Compiled by Carl Klarner (Harvard Dataverse) from official returns; not an official source

Only part of this chamber is up in a given cycle. Which districts vote on which date is not on file. Last contest in this district on file: 2024.

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Election Wrld. (2026). Missouri State Senate District 3, election results 1968 to 2024. https://www.electionwrld.com/mo/senate/3. Retrieved October 31, 2026.

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Sources

Sources: Census TIGERweb Legislative MapServer (120th CDs layer 0, 119th CDs layer 4, 2026 SLD upper layer 1 and lower layer 2) (US Census Bureau, public domain), retrieved Oct 28, 2026; Open Civic Data division identifiers (census_autogenerated us_sldl/us_sldu and openstates state files); also (sld-recent.json): Open Civic Data division identifiers (country-us) (CC0 (repository); also (sld-recent.json): CC0 1.0), retrieved Oct 28, 2026; Open States people (current) CSVs (CC0-1.0 (Open States people data)), retrieved Oct 28, 2026, compiled by Open States volunteers and staff (rosters from state legislature sites) from official returns, not an official source; MEDSL 2024 official precinct returns (individual_states zips) (Not stated in the GitHub repository (an earlier label said "MIT (repo)", which the repository does not support). MEDSL's Harvard Dataverse records are CC0 1.0, but these GitHub files were not checksum-matched to the Dataverse files, so CC0 is not claimed for them.), retrieved Oct 28, 2026, compiled by MIT Election Data and Science Lab (MEDSL) from official returns, not an official source; State Legislative Election Returns, 1967-2022 (Carl Klarner, Harvard Dataverse) (CC0 1.0), retrieved Oct 28, 2026, compiled by Carl Klarner (Harvard Dataverse) from official returns, not an official source.

District id: ocd-division/country:us/state:mo/sldu:3

DataState data (JSON)Sources: State Legislative Election Returns, 1967-2022 (Carl Klarner, Harvard Dataverse), MEDSL 2024 official precinct returnsData as of Oct 28, 2026