Colorado State Senate District 12

Next vote Tue, Nov 3, 2026 · Represented by Marc Snyder Democratic · Member list as of Oct 28

This seat has no race on the official 2026 list.

Last election: Marc Snyder (Democratic) won by 1.4 points, 2024

More about this seat

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Official results for Colorado

History (16 elections for this seat)

Votes for listed candidates: 75,598
Election day: November 5, 2024
District map: Older district map (2022 to 2024)

Colorado Senate District 12, 1968 to 2024, 2024, every candidate
Candidate	Party	Votes and share	Share
DemocraticMarc SnyderWon	Democratic	36,97148.9%	48.9%
RepublicanStan Vanderwerf	Republican	35,87247.5%	47.5%
LibertarianJohn Michael Angle	Libertarian	2,7553.6%	3.6%

Votes for listed candidates: 78,512
Election day: November 3, 2020
District map: Older district map (2012 to 2021)

Colorado Senate District 12, 1968 to 2024, 2020, every candidate
Candidate	Party	Votes and share	Share
RepublicanBob GardnerWon(incumbent)	Republican	45,80858.4%	58.4%
DemocraticElectra Johnson	Democratic	29,65637.8%	37.8%
OtherZechariah L. Harris	Other	3,0483.9%	3.9%

Votes for listed candidates: 61,009
Election day: November 8, 2016
District map: Older district map (2012 to 2021)

Colorado Senate District 12, 1968 to 2024, 2016, every candidate
Candidate	Party	Votes and share	Share
RepublicanBob GardnerWon	Republican	45,93875.3%	75.3%
LibertarianManuel Quintel	Libertarian	15,07124.7%	24.7%

Votes for listed candidates: 51,038
Election day: November 6, 2012
District map: Older district map (2012 to 2021)

Colorado Senate District 12, 1968 to 2024, 2012, every candidate
Candidate	Party	Votes and share	Share
RepublicanBill L. CadmanWon(incumbent)	Republican	34,67367.9%	67.9%
LibertarianDave Respecki	Libertarian	8,60316.9%	16.9%
OtherJames Michael Bristol	Other	7,76215.2%	15.2%

Colorado Senate District 12, 1968 to 2024, 2008, every candidate
Candidate	Party	Votes and share	Share
RepublicanKeith KingWon	Republican	29,65855.8%	55.8%
DemocraticPete Lee	Democratic	23,46844.2%	44.2%

Votes for listed candidates: 44,571
Election day: November 2, 2004
District map: Older district map (2002 to 2011)

Colorado Senate District 12, 1968 to 2024, 2004, every candidate
Candidate	Party	Votes and share	Share
RepublicanAndy McElhanyWon(incumbent)	Republican	34,67877.8%	77.8%
LibertarianRobert G. Herzfeld	Libertarian	9,89322.2%	22.2%

Votes for listed candidates: 45,991
Election day: November 7, 2000
District map: Older district map (1992 to 2001)

Colorado Senate District 12, 1968 to 2024, 2000, every candidate
Candidate	Party	Votes and share	Share
RepublicanAndy McElhanyWon	Republican	35,16576.5%	76.5%
LibertarianPatrick L. Lilly	Libertarian	10,82623.5%	23.5%

Votes for listed candidates: 41,553
Election day: November 5, 1996
District map: Older district map (1992 to 2001)

Colorado Senate District 12, 1968 to 2024, 1996, every candidate
Candidate	Party	Votes and share	Share
RepublicanMary Ann TebedoWon(incumbent)	Republican	23,14955.7%	55.7%
DemocraticTony Marino	Democratic	18,40444.3%	44.3%

Colorado Senate District 12, 1968 to 2024, 1992, every candidate
Candidate	Party	Votes and share	Share
RepublicanMary Ann TebedoWon(incumbent)	Republican	36,506100.0%	100.0%

Votes for listed candidates: 41,249
Election day: November 8, 1988
District map: Older district map (1982 to 1991)

Colorado Senate District 12, 1968 to 2024, 1988, every candidate
Candidate	Party	Votes and share	Share
RepublicanMary Ann TebedoWon	Republican	27,04365.6%	65.6%
DemocraticPaul Shepard Jr.	Democratic	14,20634.4%	34.4%

Colorado Senate District 12, 1968 to 2024, 1984, every candidate
Candidate	Party	Votes and share	Share
RepublicanSteven J. DurhamWon	Republican	15,181100.0%	100.0%

Colorado Senate District 12, 1968 to 2024, 1982, every candidate
Candidate	Party	Votes and share	Share
RepublicanHarold L. McCormickWon	Republican	12,355100.0%	100.0%

Votes for listed candidates: 17,809
Election day: November 4, 1980
District map: Older district map (1972 to 1981)

Colorado Senate District 12, 1968 to 2024, 1980, every candidate
Candidate	Party	Votes and share	Share
RepublicanSteven J. DurhamWon	Republican	13,20374.1%	74.1%
DemocraticJerry Benson	Democratic	4,60625.9%	25.9%

Votes for listed candidates: 14,672
Election day: November 2, 1976
District map: Older district map (1972 to 1981)

Colorado Senate District 12, 1968 to 2024, 1976, every candidate
Candidate	Party	Votes and share	Share
RepublicanHarold L. McCormickWon(incumbent)	Republican	9,96667.9%	67.9%
DemocraticGilchrist	Democratic	4,70632.1%	32.1%

Votes for listed candidates: 14,610
Election day: November 7, 1972
District map: Older district map (1972 to 1981)

Colorado Senate District 12, 1968 to 2024, 1972, every candidate
Candidate	Party	Votes and share	Share
RepublicanHarold L. McCormickWon	Republican	10,55272.2%	72.2%
IndependentLeland M. Leeper	Independent	4,05827.8%	27.8%

Votes for listed candidates: 15,678
Election day: November 5, 1968
District map: Older district map (1968 to 1971)

Colorado Senate District 12, 1968 to 2024, 1968, every candidate
Candidate	Party	Votes and share	Share
RepublicanNorman W. OhlsonWon	Republican	9,52460.8%	60.8%
DemocraticFrank Onufrock	Democratic	6,15439.3%	39.3%

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). Colorado State Senate District 12, election results 1968 to 2024. https://www.electionwrld.com/co/senate/12. 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:co/sldu:12

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