Colorado State Senate District 15
Tue, Nov 3 · Represented by Janice Marchman Democratic · Member list as of Oct 28
Janice Marchman 50.6Rob Woodward 49.4
Last result · 2022 generalNo published poll names both candidates.
- Last election
- Janice Marchman (Democratic) won by 1.2 points, 2022
- On the 2026 ballot
- 2 candidates
Side by side
Left column: MarchmanRight column: Woodward
- Donor-based spectrum
- LiberalCentristConservativeMarchmanWoodward
- Races
- Won 1 of 1
- Won 1 of 2
- Years since first win
- 4
- 8
How these are counted
The spectrum is a published research score, not our rating. How this works. Wins and losses count the races in our results files, the same as each profile.
More about this race
Candidates on the ballot
- Rob WoodwardRepublican
- Janice MarchmanIncumbentDemocratic
Source: coloradosos.gov (XLSX), dated Sep 15
All State Senate districts
- Democratic
- Republican
- Independent
- Nonpartisan
- More than one party
- No member listed
Map settings
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History (14 elections for this seat)
- Votes for listed candidates
- 85,122
- Election day
- November 8, 2022
- District map
- Older district map (2022)
Colorado Senate District 15, 1970 to 2022, 2022, every candidate Candidate Party Votes and share Share DemocraticJanice MarchmanWon Democratic 43,06850.6% RepublicanRob Woodward(incumbent) Republican 42,05449.4% - Votes for listed candidates
- 83,690
- Election day
- November 6, 2018
- District map
- Older district map (2012 to 2021)
Colorado Senate District 15, 1970 to 2022, 2018, every candidate Candidate Party Votes and share Share RepublicanRob WoodwardWon Republican 44,43453.1% DemocraticRebecca Cranston Democratic 39,25646.9% - Votes for listed candidates
- 47,581
- Election day
- November 4, 2014
- District map
- Older district map (2012 to 2021)
Colorado Senate District 15, 1970 to 2022, 2014, every candidate Candidate Party Votes and share Share RepublicanKevin LundbergWon(incumbent) Republican 47,581100.0% - Votes for listed candidates
- 67,175
- Election day
- November 2, 2010
- District map
- Older district map (2002 to 2011)
Colorado Senate District 15, 1970 to 2022, 2010, every candidate Candidate Party Votes and share Share RepublicanKevin LundbergWon Republican 40,04059.6% DemocraticRichard Ball Democratic 27,13540.4% - Votes for listed candidates
- 58,573
- Election day
- November 7, 2006
- District map
- Older district map (2002 to 2011)
Colorado Senate District 15, 1970 to 2022, 2006, every candidate Candidate Party Votes and share Share RepublicanSteve JohnsonWon(incumbent) Republican 35,51760.6% DemocraticJennifer Miller Democratic 23,05639.4% - Votes for listed candidates
- 49,356
- Election day
- November 5, 2002
- District map
- Older district map (2002 to 2011)
Colorado Senate District 15, 1970 to 2022, 2002, every candidate Candidate Party Votes and share Share RepublicanSteve JohnsonWon Republican 30,82562.5% DemocraticKathy Gilliland Democratic 18,53137.5% - Votes for listed candidates
- 44,268
- Election day
- November 3, 1998
- District map
- Older district map (1992 to 2001)
Colorado Senate District 15, 1970 to 2022, 1998, every candidate Candidate Party Votes and share Share DemocraticStan MatsunakaWon(incumbent) Democratic 22,52650.9% RepublicanKevin Lundberg Republican 21,74249.1% - Votes for listed candidates
- 37,780
- Election day
- November 8, 1994
- District map
- Older district map (1992 to 2001)
Colorado Senate District 15, 1970 to 2022, 1994, every candidate Candidate Party Votes and share Share DemocraticStan MatsunakaWon Democratic 19,70952.2% RepublicanJim Roberts(incumbent) Republican 18,07147.8% - Votes for listed candidates
- 27,564
- Election day
- November 6, 1990
- District map
- Older district map (1982 to 1991)
Colorado Senate District 15, 1970 to 2022, 1990, every candidate Candidate Party Votes and share Share RepublicanJim RobertsWon Republican 14,60053.0% DemocraticPaul Vaughan Democratic 12,96447.0% - Votes for listed candidates
- 21,943
- Election day
- November 4, 1986
- District map
- Older district map (1982 to 1991)
Colorado Senate District 15, 1970 to 2022, 1986, every candidate Candidate Party Votes and share Share RepublicanWayne AllardWon(incumbent) Republican 21,943100.0% - Votes for listed candidates
- 24,164
- Election day
- November 2, 1982
- District map
- Older district map (1982 to 1991)
Colorado Senate District 15, 1970 to 2022, 1982, every candidate Candidate Party Votes and share Share RepublicanWayne AllardWon Republican 14,45159.8% DemocraticLeo Berger Democratic 9,71340.2% - Votes for listed candidates
- 29,384
- Election day
- November 7, 1978
- District map
- Older district map (1972 to 1981)
Colorado Senate District 15, 1970 to 2022, 1978, every candidate Candidate Party Votes and share Share RepublicanSam BarnhillWon Republican 18,75263.8% DemocraticJohn G. Canny Democratic 8,95330.5% LibertarianJim Phelps Libertarian 1,6795.7% - Votes for listed candidates
- 27,168
- Election day
- November 4, 1974
- District map
- Older district map (1972 to 1981)
Colorado Senate District 15, 1970 to 2022, 1974, every candidate Candidate Party Votes and share Share RepublicanJoseph B. SchieffelinWon(incumbent) Republican 15,46156.9% DemocraticJames A. Astle Democratic 11,70743.1% - Votes for listed candidates
- 23,662
- Election day
- November 3, 1970
- District map
- Older district map (1968 to 1971)
Colorado Senate District 15, 1970 to 2022, 1970, every candidate Candidate Party Votes and share Share RepublicanJoseph B. SchieffelinWon(incumbent) Republican 23,662100.0%
1970 to 2022: 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: 2022.
Download and cite
Cite this page
Election Wrld. (2026). Colorado State Senate District 15, election results 1970 to 2022. https://www.electionwrld.com/co/senate/15. Retrieved October 31, 2026.
Embed this seat
<iframe src="https://www.electionwrld.com/embed/co/senate/15" title="Colorado Senate District 15" width="100%" height="400" style="border:0;max-width:640px" loading="lazy"></iframe>
<p style="font-size:13px">Data: <a href="https://www.electionwrld.com">Election Wrld</a>, CC BY 4.0</p>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; 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:15
DataState data (JSON)Sources: State Legislative Election Returns, 1967-2022 (Carl Klarner, Harvard Dataverse), DIME (ODC-BY)Data as of Oct 28, 2026