DemocratIn office since Nov 2018

Mary Isaacson

Pennsylvania State Representative, District 175 since 2018. Ran in 4 elections between 2018 and 2024, winning 4. Re-elected in 2026. Next on the ballot in 2028.

Pennsylvania State Representative, District 175Born 1970

Official website Wikipedia

In office: 7 yrs; Since 2018
Bills became law: 1; 36 sponsored, 2025–2026 session
Votes missed: 0.0%; Chamber median 0.0%
With party: 100%; On votes splitting the parties
Next election: 2028; Nov 7, 2028
Elections: 5; 2018–2026

Source: Wikidata, congress-legislators and Open States; 99chambers legislative recordsUpdated Oct 27, 2026, 9:43 AM ET

Committees

As of 2026-10.

Transportation · secretary
Consumer Protection, Technology and Utilities
Education
Environmental and Natural Resource Protection
Ethics
Liquor Control

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

Legislation

2025–2026 session · 36 sponsored · 1 became law

BillIntroCmteHouseSenateLaw

HB 558 An Act amending the act of April 6, 1951 (P.L.69, No.20), known as The Landlord and Tenant Act of 1951, in…
Became law Oct 2026

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

Voting record

2025–2026 session · placement by roll-call votes

Where Isaacson sits in the Pennsylvania House of Representatives

Isaacson is closer to the center than 3% of the chamber's Democrats.

Closest: Ben Waxman, Danilo Burgos, Joe Hohenstein

Source: 99chambers roll-call scalingUpdated Nov 6, 2026, 5:00 PM ET

With Isaacson’s party

Votes with the chamber's Democrats100%
Cosponsorships of the other party's bills3%

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

Source: 99chambers legislative scores from roll calls and cosponsorships

Key votes

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

Date	Bill	Isaacson	Dem. majority	Rep. majority	Result
Oct 19, 2026	SB 908: An Act amending the act of August 15, 1961 (P.L.987, No.442), known as the Pennsylvania…	Yes	Yes	No	Passed 128–75
Oct 19, 2026	SB 1260: An Act providing for licensure of electrical contractors, electricians, residential…	Yes	Yes	No	Passed 116–87
Oct 5, 2026	HB 2380: An Act amending Title 66 (Public Utilities) of the Pennsylvania Consolidated Statutes, in…	Yes	Yes	No	Passed 116–86
Sep 29, 2026	HB 280: An Act amending the act of June 3, 1937 (P.L.1333, No.320), known as the Pennsylvania…	Yes	Yes	No	Passed 115–88
Jun 15, 2026	HB 2084: An Act amending the act of March 10, 1949 (P.L.30, No.14), known as the Public School…	Yes	Yes	No	Passed 119–83

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

Career

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

20182019202020212022202320242025202620272028Pennsylvania House of Representatives, District 175

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	Pennsylvania House of Representatives, District 175	Won	—	D+68.3	—
2024	Pennsylvania House of Representatives, District 175	Won	—	D+68.3	—
2022	Pennsylvania House of Representatives, District 175	Won	—	D+68.8	—
2020	Pennsylvania House of Representatives, District 175	Won	—	—	—
2018	Pennsylvania House of Representatives, District 175	Won	—	—	—