Leaving office January 3, 2027.Did not run for re-election in 2026. This page switches to the former-officeholder layout when the term ends.

RepublicanIn office until January 3, 2027

Cynthia M. Lummis

U.S. Senator from Wyoming since 2021. Did not run for re-election in 2026; leaves office in January 2027. Ran in 5 elections between 2008 and 2020, winning 5.

U.S. Senator from WyomingBorn 1954

Official website Wikipedia Congress.gov FEC filings

In office: 5 yrs; Since 2021
Bills became law: 2; 48 sponsored, 119th Congress
Votes missed: 3.3%; Chamber median 2.1%
With party: 100%; On votes splitting the parties
Last margin: +46.1; Won 2020
Elections: 5; 2008–2020

Source: Wikidata, congress-legislators and Open States; 99chambers legislative recordsUpdated Nov 7, 2026, 3:00 PM ET

Committees

119th Congress.

Senate Committee on Banking, Housing, and Urban AffairsFinancial Institutions and Consumer ProtectionSecurities, Insurance, and InvestmentDigital Assets · Chairman
Senate Committee on Commerce, Science, and TransportationTelecommunications and MediaConsumer Protection, Technology, and Data PrivacyScience, Manufacturing, and Competitiveness
Senate Committee on Environment and Public WorksClean Air, Climate, and Nuclear Innovation and Safety · ChairmanFisheries, Water, and WildlifeTransportation and Infrastructure

Source: congress-legislators committeesUpdated Nov 7, 2026, 3:00 PM ET

Legislation

119th Congress · 48 sponsored · 2 became law

BillIntroCmteSenateHouseLaw

S 790 A bill to redesignate the National Historic Trails Interpretive Center in Casper, Wyoming, as the "Barbara…
Public Lands and Natural Resources · Became law Sep 2026

S 284 Congressional Award Program Reauthorization Act
Congress · Became law Dec 2025

Source: Congress.gov billsUpdated Nov 6, 2026, 3:27 PM ET

Voting record

119th Congress · placement by roll-call votes

Where Lummis sits in the U.S. Senate

Lummis is closer to the center than 11% of the chamber's Republicans.

Closest: Eric Schmitt, Rick Scott, John Barrasso

Source: 99chambers roll-call scalingUpdated Nov 6, 2026, 5:06 PM ET

With Lummis’s party

Votes with the chamber's Republicans100%
Cosponsorships of the other party's bills16%

Black tick: the average of Republicans in the U.S. Senate.

Source: 99chambers legislative scores from roll calls and cosponsorships

Key votes

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

Date	Bill	Lummis	Rep. majority	Dem. majority	Result
Jun 5, 2026	S 2: Secure America Act	Yes	Yes	No	Passed 52–47
Apr 16, 2026	HJRES 140: Providing for congressional disapproval under chapter 8 of title 5, United States Code,…	Yes	Yes	No	Passed 50–49
Feb 12, 2026	HJRES 142: Disapproving the action of the District of Columbia Council in approving the D.C.…	Yes	Yes	No	Passed 49–47
Jan 30, 2026	HR 7148: Consolidated Appropriations Act, 2026	Yes	Yes	No	Passed 71–29
Dec 4, 2025	HJRES 131: Providing for congressional disapproval under chapter 8 of title 5, United States Code,…	Yes	Yes	No	Passed 49–45

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

Career

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

20082010201220142016201820202022202420262028U.S. House, WY-AT-LARGE U.S. Senate, Wyoming

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	+/−
2020	U.S. Senate, Wyoming	Won	R+46.1	R+45.0	+1.1
2014	U.S. House, WY-AL	Won	R+45.6	R+42.3	+3.3
2012	U.S. House, WY-AL	Won	R+45.1	R+42.3	+2.8
2010	U.S. House, WY-AL	Won	R+45.9	R+33.1	+12.8
2008	U.S. House, WY-AL	Won	R+9.8	R+33.1	−23.3