Illinois State House District 104
Tue, Nov 3 · Represented by Brandun Schweizer Republican · Member list as of Oct 28
No published poll names both candidates.Last result · 2024 general: Brandun Schweizer (R) 50.3, Jarrett Clem (D) 49.7
- Last election
- Brandun Schweizer (Republican) won by 0.6 points, 2024
- On the 2026 ballot
- 2 candidates
Side by side
Left column: RobersonRight column: Schweizer
- Races
- None listed
- Won 1 of 1
- Years since first win
- Not available
- 2
How these are counted
Wins and losses count the races in our results files, the same as each profile.
More about this race
Candidates on the ballot
- Mary Catherine RobersonDemocratic
- Brandun SchweizerIncumbentRepublican
Party nominees only, not the certified ballot.
Source: elections.il.gov, dated Oct 28
All State House districts
- Democratic
- Republican
- Independent
- Nonpartisan
- More than one party
- No member listed
Map settings
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History (22 elections for this seat)
- Votes for listed candidates
- 46,823
- Election day
- November 5, 2024
- District map
- Older district map (2022 to 2024)
Illinois House of Representatives District 104, 1982 to 2024, 2024, every candidate Candidate Party Votes and share Share RepublicanBrandun SchweizerWon Republican 23,54650.3% DemocraticJarrett Clem Democratic 23,27749.7% - Votes for listed candidates
- 36,308
- Election day
- November 8, 2022
- District map
- Older district map (2022)
Illinois House of Representatives District 104, 1982 to 2024, 2022, every candidate Candidate Party Votes and share Share RepublicanMike MarronWon(incumbent) Republican 19,61354.0% DemocraticCynthia E. Cunningham Democratic 16,69546.0% - Votes for listed candidates
- 46,103
- Election day
- November 3, 2020
- District map
- Older district map (2012 to 2021)
Illinois House of Representatives District 104, 1982 to 2024, 2020, every candidate Candidate Party Votes and share Share RepublicanMike MarronWon(incumbent) Republican 27,09658.8% DemocraticCynthia E. Cunningham Democratic 19,00741.2% - Votes for listed candidates
- 36,389
- Election day
- November 6, 2018
- District map
- Older district map (2012 to 2021)
Illinois House of Representatives District 104, 1982 to 2024, 2018, every candidate Candidate Party Votes and share Share RepublicanMike MarronWon Republican 20,34855.9% DemocraticCynthia E. Cunningham Democratic 16,04144.1% - Votes for listed candidates
- 35,556
- Election day
- November 8, 2016
- District map
- Older district map (2012 to 2021)
Illinois House of Representatives District 104, 1982 to 2024, 2016, every candidate Candidate Party Votes and share Share RepublicanChad HaysWon(incumbent) Republican 35,556100.0% - Votes for listed candidates
- 26,069
- Election day
- November 4, 2014
- District map
- Older district map (2012 to 2021)
Illinois House of Representatives District 104, 1982 to 2024, 2014, every candidate Candidate Party Votes and share Share RepublicanChad HaysWon(incumbent) Republican 26,069100.0% - Votes for listed candidates
- 41,719
- Election day
- November 6, 2012
- District map
- Older district map (2012 to 2021)
Illinois House of Representatives District 104, 1982 to 2024, 2012, every candidate Candidate Party Votes and share Share RepublicanChad D. HaysWon(incumbent) Republican 26,47963.5% DemocraticMichael Langendorf Democratic 15,24036.5% - Votes for listed candidates
- 29,965
- Election day
- November 2, 2010
- District map
- Older district map (2002 to 2011)
Illinois House of Representatives District 104, 1982 to 2024, 2010, every candidate Candidate Party Votes and share Share RepublicanChad D. HaysWon Republican 20,45268.3% DemocraticMichael Puhr Democratic 9,51331.8% - Votes for listed candidates
- 42,965
- Election day
- November 4, 2008
- District map
- Older district map (2002 to 2011)
Illinois House of Representatives District 104, 1982 to 2024, 2008, every candidate Candidate Party Votes and share Share RepublicanWilliam B. BlackWon(incumbent) Republican 27,62164.3% DemocraticLori A. Deyoung Democratic 15,34435.7% - Votes for listed candidates
- 27,113
- Election day
- November 7, 2006
- District map
- Older district map (2002 to 2011)
Illinois House of Representatives District 104, 1982 to 2024, 2006, every candidate Candidate Party Votes and share Share RepublicanWilliam B. BlackWon(incumbent) Republican 27,113100.0% - Votes for listed candidates
- 38,480
- Election day
- November 2, 2004
- District map
- Older district map (2002 to 2011)
Illinois House of Representatives District 104, 1982 to 2024, 2004, every candidate Candidate Party Votes and share Share RepublicanWilliam B. BlackWon(incumbent) Republican 38,480100.0% - Votes for listed candidates
- 31,441
- Election day
- November 5, 2002
- District map
- Older district map (2002 to 2011)
Illinois House of Representatives District 104, 1982 to 2024, 2002, every candidate Candidate Party Votes and share Share RepublicanWilliam B. BlackWon(incumbent) Republican 24,19377.0% DemocraticCharles D. Mattis Democratic 7,24823.1% - Votes for listed candidates
- 35,968
- Election day
- November 7, 2000
- District map
- Older district map (1992 to 2001)
Illinois House of Representatives District 104, 1982 to 2024, 2000, every candidate Candidate Party Votes and share Share RepublicanTom BernsWon Republican 19,19453.4% DemocraticCharles Conner Democratic 16,77446.6% - Votes for listed candidates
- 26,814
- Election day
- November 3, 1998
- District map
- Older district map (1992 to 2001)
Illinois House of Representatives District 104, 1982 to 2024, 1998, every candidate Candidate Party Votes and share Share RepublicanTimothy V. JohnsonWon(incumbent) Republican 14,22053.0% DemocraticMichael W. Frerichs Democratic 12,02644.9% LibertarianDavid D. Wood Jr. Libertarian 5682.1% - Votes for listed candidates
- 32,745
- Election day
- November 5, 1996
- District map
- Older district map (1992 to 2001)
Illinois House of Representatives District 104, 1982 to 2024, 1996, every candidate Candidate Party Votes and share Share RepublicanTimothy V. JohnsonWon(incumbent) Republican 20,49062.6% DemocraticBob Kirchner Democratic 12,25537.4% - Votes for listed candidates
- 24,632
- Election day
- November 8, 1994
- District map
- Older district map (1992 to 2001)
Illinois House of Representatives District 104, 1982 to 2024, 1994, every candidate Candidate Party Votes and share Share RepublicanTimothy V. JohnsonWon(incumbent) Republican 18,06673.3% DemocraticJim Anderson Democratic 6,56626.7% - Votes for listed candidates
- 38,814
- Election day
- November 3, 1992
- District map
- Older district map (1992 to 2001)
Illinois House of Representatives District 104, 1982 to 2024, 1992, every candidate Candidate Party Votes and share Share RepublicanTimothy V. JohnsonWon(incumbent) Republican 23,54460.7% DemocraticHelen F. Satterthwaite(incumbent) Democratic 15,27039.3% - Votes for listed candidates
- 29,198
- Election day
- November 6, 1990
- District map
- Older district map (1982 to 1991)
Illinois House of Representatives District 104, 1982 to 2024, 1990, every candidate Candidate Party Votes and share Share RepublicanTimothy V. JohnsonWon(incumbent) Republican 20,64770.7% DemocraticBob Morrison Democratic 8,55129.3% - Votes for listed candidates
- 25,820
- Election day
- November 8, 1988
- District map
- Older district map (1982 to 1991)
Illinois House of Representatives District 104, 1982 to 2024, 1988, every candidate Candidate Party Votes and share Share RepublicanTimothy V. JohnsonWon(incumbent) Republican 25,820100.0% - Votes for listed candidates
- 26,790
- Election day
- November 4, 1986
- District map
- Older district map (1982 to 1991)
Illinois House of Representatives District 104, 1982 to 2024, 1986, every candidate Candidate Party Votes and share Share RepublicanTimothy V. JohnsonWon(incumbent) Republican 18,98670.9% DemocraticJerry Stout Democratic 7,80429.1% - Votes for listed candidates
- 29,376
- Election day
- November 6, 1984
- District map
- Older district map (1982 to 1991)
Illinois House of Representatives District 104, 1982 to 2024, 1984, every candidate Candidate Party Votes and share Share RepublicanTimothy V. JohnsonWon(incumbent) Republican 29,375100.0% Scattered write-ins Write-in 10.0% - Votes for listed candidates
- 28,276
- Election day
- November 2, 1982
- District map
- Older district map (1982 to 1991)
Illinois House of Representatives District 104, 1982 to 2024, 1982, every candidate Candidate Party Votes and share Share RepublicanTimothy V. JohnsonWon(incumbent) Republican 19,49669.0% DemocraticJacqueline Birkey Democratic 8,78031.1%
- 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
- 1982 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
Last contest in this district on file: 2024.
Download and cite
Cite this page
Election Wrld. (2026). Illinois State House District 104, election results 1982 to 2024. https://www.electionwrld.com/il/house/104. Retrieved October 30, 2026.
Embed this seat
<iframe src="https://www.electionwrld.com/embed/il/house/104" title="Illinois House of Representatives District 104" 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; 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:il/sldl:104
DataState data (JSON)Sources: State Legislative Election Returns, 1967-2022 (Carl Klarner, Harvard Dataverse), MEDSL 2024 official precinct returnsData as of Oct 28, 2026