DemocratIn office since Nov 2018

Karen McMahon

New York State Assemblymember, District 146 since 2018. Ran in 4 elections between 2018 and 2024, winning 4. Re-elected in 2026. Next on the ballot in 2028.

New York State Assemblymember, District 146Born 1959

Official website Wikipedia

In office: 7 yrs; Since 2018
Bills became law: 6; 66 sponsored, 2025–2026 session
Votes missed: 3.0%; Chamber median 2.5%
With party: 93%; On votes splitting the parties
Last margin: +23.8; Won 2026
Next election: 2028; Nov 7, 2028

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

Committees

As of 2026-10.

Ethics and Guidance · chair
Legislative Ethics Commission · co-chair
Legislative Ethics Legislative Commission · chair
Environmental Conservation
Food, Farm and Nutrition Policy Task Force
Higher Education
Judiciary
Legislative Women's Caucus
Libraries and Education Technology
New York Canada Relations Task Force
People with Disabilities
Transportation

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

Legislation

2025–2026 session · 66 sponsored · 6 became law

BillIntroCmteHouseSenateLaw

A 10201 Exempts the village of Williamsville fire department from the requirement that the percentage of…
Became law Oct 2026

A 6790 Relates to tax credits for volunteer firefighters and volunteer ambulance workers
Became law Oct 2026

A 10293 Authorizes Michael O'Brien to take the competitive civil service examination for the position of police…
Became law Sep 2026

A 10932 Authorizes an occupancy tax in the town of Amherst
Became law Aug 2026

A 4030 Authorizes the discontinuance of certain parklands in the town of Amherst, county of Erie
Became law Aug 2025

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

Voting record

2025–2026 session · placement by roll-call votes

Where McMahon sits in the New York State Assembly

McMahon is closer to the center than 95% of the chamber's Democrats.

Closest: Al Stirpe, Phil Ramos, John Zaccaro

Source: 99chambers roll-call scalingUpdated Nov 6, 2026, 4:58 PM ET

With McMahon’s party

Votes with the chamber's Democrats93%
Cosponsorships of the other party's bills0%

Black tick: the average of Democrats in the New York State Assembly.

Source: 99chambers legislative scores from roll calls and cosponsorships

Key votes

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

Date	Bill	McMahon	Dem. majority	Rep. majority	Result
Jun 5, 2026	S 10643: Relates to labor peace agreements and the cannabis industry wage board; repealer	Yes	Yes	No	Passed 98–34
Jun 4, 2026	A 11561: Enacts into law necessary legislation including extensions and technical corrections	Yes	Yes	No	Passed 100–39
Jun 3, 2026	A 11349: Authorizes the town of Clarkstown to establish community preservation funds and to impose…	No	Yes	No	Passed 94–46
Jun 3, 2026	A 10391: Relates to adjudications and owner liability for a violation of traffic-control signal…	Yes	Yes	No	Passed 111–29
Mar 31, 2026	S 8812: Relates to the effectiveness of provisions of law relating to the provision of gas service…	Yes	Yes	No	Passed 83–61

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

Career

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

20182019202020212022202320242025202620272028New York State Assembly, District 146

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	New York State Assembly, District 146	Won	D+23.8	D+20.9	+2.9
2024	New York State Assembly, District 146	Won	D+20.0	D+20.9	−0.9
2022	New York State Assembly, District 146	Won	D+16.2	—	—
2020	New York State Assembly, District 146	Won	D+11.5	—	—
2018	New York State Assembly, District 146	Won	D+6.6	—	—