Margaret DeLaRosa
Margaret DeLaRosa (Democratic Party) is a member of the Illinois House of Representatives, representing District 42. She assumed office on October 12, 2025. Her current term ends on January 13, 2027.
DeLaRosa is also an at-large member of the Glenbard Township High School District 87 school board in Illinois. Her current term ends in 2029.
DeLaRosa (Democratic Party) is running for re-election to the Illinois House of Representatives to represent District 42. She is on the ballot in the general election on November 3, 2026. She advanced from the Democratic primary on March 17, 2026.
Illinois House Democrats appointed DeLaRosa to the Illinois House of Representatives District 42 on October 12, 2025, to replace Terra Costa Howard (D).
Biography
Margaret DeLaRosa earned a bachelor's degree in accounting from DePaul University. DeLaRosa's career experience includes working as a business analyst for a global consulting firm and serving as a school board member. DeLaRosa has served in the League of Women Voters.[1]
Sponsored legislation
The following table lists bills this person sponsored as a legislator, according to BillTrack50 and sorted by action history. Bills are sorted by the date of their last action. The following list may not be comprehensive. To see all bills this legislator sponsored, click on the legislator's name in the title of the table.
Elections
2026
See also: Illinois House of Representatives elections, 2026
General election
The general election will occur on November 3, 2026.
The candidate list in this election may not be complete.
General election for Illinois House of Representatives District 42
Incumbent Margaret DeLaRosa (D) and Stephanie Trussell (R) are running in the general election for Illinois House of Representatives District 42 on November 3, 2026.
Candidate | ||
 | Margaret DeLaRosa (D) | |
 | Stephanie Trussell (R) | |
| ||||
 = candidate completed the Ballotpedia Candidate Connection survey. | ||||
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Democratic primary
The candidate list in this election may not be complete.
Democratic primary for Illinois House of Representatives District 42
Incumbent Margaret DeLaRosa (D) defeated Lynn LaPlante (D) in the Democratic primary for Illinois House of Representatives District 42 on March 17, 2026.
Candidate | % | Votes | ||
| ✔ | | Margaret DeLaRosa | 59.1 | 9,039 |
 | Lynn LaPlante | 40.9 | 6,255 | |
| Total votes: 15,294 | |||
| = candidate completed the Ballotpedia Candidate Connection survey. | ||||
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Do you want a spreadsheet of this type of data? Contact our sales team. | ||||
Republican primary
The candidate list in this election may not be complete.
Republican primary for Illinois House of Representatives District 42
Stephanie Trussell (R) advanced from the Republican primary for Illinois House of Representatives District 42 on March 17, 2026.
Candidate | ||
| ✔ | | Stephanie Trussell |
| ||||
| = candidate completed the Ballotpedia Candidate Connection survey. | ||||
| If you are a candidate and would like to tell readers and voters more about why they should vote for you, complete the Ballotpedia Candidate Connection Survey. | ||||
Do you want a spreadsheet of this type of data? Contact our sales team. | ||||
Campaign finance
Endorsements
DeLaRosa received the following endorsements. To send us additional endorsements, click here.
- U.S. Rep. Sean Casten (D)
- Pragmatic progressive leaders (Sway viewpoint group by Eli Brottman)
Campaign themes
2026
Ballotpedia survey responses
See also: Ballotpedia's Candidate Connection
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Campaign finance summary
Campaign finance information for this candidate is not yet available from OpenSecrets. That information will be published here once it is available.
Scorecards
A scorecard evaluates a legislator’s voting record. Its purpose is to inform voters about the legislator’s political positions. Because scorecards have varying purposes and methodologies, each report should be considered on its own merits. For example, an advocacy group’s scorecard may assess a legislator’s voting record on one issue while a state newspaper’s scorecard may evaluate the voting record in its entirety.
Ballotpedia is in the process of developing an encyclopedic list of published scorecards. Some states have a limited number of available scorecards or scorecards produced only by select groups. It is Ballotpedia’s goal to incorporate all available scorecards regardless of ideology or number.
Click here for an overview of legislative scorecards in all 50 states. To contribute to the list of scorecards, email suggestions to editor@ballotpedia.org.
Below you can find the scorecards found for the Illinois General Assembly in 2023.
- Illinois Environmental Council — Legislators are scored on their votes on bills related to environmental issues.
- Illinois Realtors — Legislators are scored on votes on bills affecting real estate and private property.
Below you can find the scorecards found for the Illinois General Assembly in 2022.
- Illinois Environmental Council — Legislators are scored on their votes on bills related to environmental issues.
- Illinois Realtors — Legislators are scored on votes on bills affecting real estate and private property.
- National Federation of Independent Business — Legislators are scored on their votes on bills related to business issues.
- Planned Parenthood Illinois Action — Legislators are scored on their stances on policies related to reproductive health issues.
- Technology and Manufacturing Association — Legislators are scored on their votes on bills related to manufacturing issues.
Below you can find the scorecards found for the Illinois General Assembly in 2021.
- Illinois Environmental Council — Legislators are scored on their votes on bills related to environmental issues.
- Illinois Humane Society — Legislators are scored on their votes on bills related to pets and wildlife.
- Illinois Realtors — Legislators are scored on votes on bills affecting real estate and private property.
- The American Conservative Union — Legislators are scored on their votes on conservative issues.
Below you can find the scorecards found for the Illinois General Assembly in 2020.
- Illinois Environmental Council — Legislators are scored on their votes on bills related to environmental issues.
- Illinois Parents of Adults with Developmental Disabilities — Legislators are scored on their votes on bills that help or hinder Illinois citizens with developmental disabilities access more included lives in their homes and communities.
- National Federation of Independent Business — Legislators are scored on their votes on bills related to business issues.
- The American Conservative Union — Legislators are scored on their votes on conservative issues.
Below you can find the scorecards found for the Illinois General Assembly in 2019.
- Illinois Environmental Council — Legislators are scored on their votes on bills related to environmental issues.
- Illinois Parents of Adults with Developmental Disabilities — Legislators are scored on their votes on bills that help or hinder Illinois citizens with developmental disabilities access more included lives in their homes and communities.
- Technology and Manufacturing Association — Legislators are scored on their votes on manufacturing issues.
- The American Conservative Union — Legislators are scored on their votes on conservative issues.
Below you can find the scorecards found for the Illinois General Assembly in 2018.
- Illinois Environmental Council — Legislators are scored on their votes on bills related to environmental issues.
- Illinois Parents of Adults with Developmental Disabilities — Legislators are scored on their votes on bills that help or hinder Illinois citizens with developmental disabilities access more included lives in their homes and communities.
- Technology and Manufacturing Association — Legislators are scored on their votes on manufacturing issues.
- The American Conservative Union — Legislators are scored on their votes on conservative issues.
Below you can find the scorecards found for the Illinois General Assembly in 2017.
- Citizen Action Illinois — Legislators are scored on votes on bills that show dedication to social and economic justice and protecting Illinois’ consumers.
- Illinois Environmental Council — Legislators are scored on their votes on bills related to environmental issues.
- Illinois Parents of Adults with Developmental Disabilities — Legislators are scored on their votes on bills that help or hinder Illinois citizens with developmental disabilities access more included lives in their homes and communities.
- Technology and Manufacturing Association — Legislators are scored on their votes on manufacturing issues.
- The American Conservative Union — Legislators are scored on their votes on conservative issues.
Below you can find the scorecards found for the Illinois General Assembly in 2016.
- Citizen Action Illinois — Legislators are scored on votes on bills that show dedication to social and economic justice and protecting Illinois’ consumers.
- Illinois Environmental Council — Legislators are scored on their votes on bills related to environmental issues.
- Illinois Parents of Adults with Developmental Disabilities — Legislators are scored on their votes on bills that help or hinder Illinois citizens with developmental disabilities access more included lives in their homes and communities.
- National Federation of Independent Business — Legislators are scored on their votes on bills related to business issues.
- The American Conservative Union — Legislators are scored on their votes on conservative issues.
Below you can find the scorecards found for the Illinois General Assembly in 2015.
- Illinois Environmental Council — Legislators are scored on their votes on bills related to environmental issues.
- Technology and Manufacturing Association — Legislators are scored on their votes on manufacturing issues.
- The American Conservative Union — Legislators are scored on their votes on conservative issues.
See also
2026 Elections
External links
|
Candidate Illinois House of Representatives District 42 |
Officeholder Illinois House of Representatives District 42 |
Footnotes
| Political offices | ||
|---|---|---|
| Preceded by Terra Costa Howard (D) |
Illinois House of Representatives District 42 2025-Present |
Succeeded by - |
| Preceded by - |
Glenbard Township High School District 87, At-large 2015 |
Succeeded by - |
| Preceded by - |
Glenbard Township High School District 87, At-large -Present |
Succeeded by - |
