DemocratIn office since Nov 2016

Theresa Mah

Illinois State Representative, District 24 since 2016. Ran in 5 elections between 2016 and 2024, winning 5. Re-elected in 2026. Next on the ballot in 2028.

Illinois State Representative, District 24

Official website Wikipedia

In office: 9 yrs; Since 2016
Bills became law: 10; 39 sponsored, 2025–2026 session
Votes missed: 0.7%; Chamber median 3.8%
With party: 100%; On votes splitting the parties
Last margin: +56.3; Won 2024
Next election: 2028; Nov 7, 2028

Source: Wikidata, congress-legislators and Open States; 99chambers legislative recordsUpdated Oct 27, 2026, 1:52 PM ET

Committees

As of 2026-10.

Health Care Licenses · vice chair
Appropriations: Higher Education
Consumer Protection
Executive
Health Care Availability and Accessibility
Immigration and Human Rights
Museum, Arts, Culture and Entertainment
Public Health

Source: Open States committeesUpdated Oct 27, 2026, 9:43 AM ET

Legislation

2025–2026 session · 39 sponsored · 10 became law

BillIntroCmteHouseSenateLaw

SB 3465 CONSTRUCTION-SANITARY REQS
Became law Aug 2026

SB 3896 WHOLESALE DRUG DISTRIBUTORS
Became law Jul 2026

HB 5435 SOCIAL WORK LICENSURE REQS
Became law Jul 2026

SB 2879 ASSISTED LIVING-DEMENTIA
Became law Jul 2026

HB 4757 HEALTH CARE FACILITY PLANNING
Became law Jul 2026

Source: Open States billsUpdated Nov 6, 2026, 4:22 PM ET

Voting record

2025–2026 session · placement by roll-call votes

Where Mah sits in the Illinois House of Representatives

Mah is closer to the center than 0% of the chamber's Democrats.

Closest: Justin Slaughter, Will Guzzardi, Will Davis

Source: 99chambers roll-call scalingUpdated Nov 6, 2026, 4:49 PM ET

With Mah’s party

Votes with the chamber's Democrats100%
Cosponsorships of the other party's bills2%

Black tick: the average of Democrats in the Illinois House of Representatives.

Source: 99chambers legislative scores from roll calls and cosponsorships

Key votes

Votes chosen for their effect, not their side: Mah’s vote, each party’s majority, and the result. An orange vote differs from most Democrats.

Date	Bill	Mah	Dem. majority	Rep. majority	Result
May 31, 2026	SB 3222: VIDEO STREAMING AD VOLUME	Yes	Yes	No	Passed 77–31
May 29, 2026	SB 2762: INS-SEIZURE DETECTION DEVICE	Yes	Yes	No	Passed 82–25
May 27, 2026	SB 3020: DOMESTIC VIOLENCE-HARASSMENT	Yes	Yes	No	Passed 91–23
May 21, 2026	SB 2770: LOC FIRST RESPONDER INSURANCE	Yes	Yes	No	Passed 89–21
Apr 17, 2026	HB 4379: ADULT CHANGING STATIONS	Yes	Yes	No	Passed 72–18

Source: 99chambers key votes from Congress.gov, Voteview and Open States roll calls

Career

Offices held, and every time Mah was on a ballot. Filled marks are general elections won; hollow marks are primaries; an orange outline is a loss.

2016201720182019202020212022202320242025202620272028Illinois House of Representatives, District 2 Illinois House of Representatives, District 24

Source: 99chambers results archive (MEDSL, Klarner, state election offices)

Elections

Margin against the seat’s presidential baseline: how the seat voted for president in the same or nearest year.

Year	Race	Result	Margin	Seat	+/−
2026	Illinois House of Representatives, District 24	Won	—	D+38.9	—
2024	Illinois House of Representatives, District 24	Won	D+56.3	D+38.9	+17.4
2022	Illinois House of Representatives, District 24	Won	—	D+60.6	—
2020	Illinois House of Representatives, District 2	Won	—	—	—
2018	Illinois House of Representatives, District 2	Won	—	—	—
2016	Illinois House of Representatives, District 2	Won	—	—	—