United States Congress: Massachusetts Federal Delegation

Congress, located in Washington, D.C., passes laws that apply to the entire country. Each Congress is two years and includes two legislative sessions, one per year. The 119th Congress is in the first of its two legislative sessions, which began on January 3, 2025 and will end on January 3, 2026. Every citizen is represented by two U.S. Senators — in Massachusetts, these are Senators Ed Markey and Elizabeth Warren — and one U.S. Representative. There are nine representatives in Massachusetts, one of whom represents you depending on where you live. Find your Representative here.

See which federal legislation we support and oppose, learn more about legislators, and read our tips on engaging with your elected officials.

Senators

(Both represent all Massachusetts residents.)

Elizabeth Warren
309 Hart Senate Office Building
Washington, D.C. 20510
Phone: (202) 224-4543
Website: www.warren.senate.gov

Edward J. Markey
255 Dirksen Senate Office Building
Washington, D.C. 20510
Phone: (202) 224-2742
Website: www.markey.senate.gov

Representatives

(One represents each congressional district in Massachusetts. Find your Representative here.)

Richard Neal (1st Congressional District)
372 Cannon House Office Building
Washington, D.C. 20515
Phone: (202) 225-5601; Fax: (202) 225-8112
Website: neal.house.gov

James P. McGovern (2nd Congressional District)
370 Cannon House Office Building
Washington, D.C. 20515
Phone: (202) 225-6101; Fax: (202) 225-5759
Website: mcgovern.house.gov

Lori Trahan (3rd Congressional District)
2439 Rayburn House Office Building
Washington, D.C. 20515
Phone: (202) 225-3411
Website: trahan.house.gov

Jake Auchincloss (4th Congressional District)
1524 Longworth House Office Building
Washington, D.C. 20515
Phone: (202) 225-5931
Website: auchincloss.house.gov 

Katherine Clark (5th Congressional District)
2448 Rayburn House Office Building
Washington, D.C. 20515
Phone: (202) 225-2836
Website: katherineclark.house.gov

Seth Moulton (6th Congressional District)
1127 Longworth House Office Building
Washington, D.C. 20515
Phone: (202) 225-8020; Fax: (202) 225-5915
Website: moulton.house.gov

Ayanna Pressley (7th Congressional District)
1108 Longworth House Office Building
Washington, D.C. 20515
Phone: (202) 225-5111
Website: pressley.house.gov

Stephen Lynch (8th Congressional District)
2109 Rayburn House Office Building
Washington, D.C. 20515
Phone: (202) 225-8273; Fax: (202) 225-3984
Website: lynch.house.gov

Bill Keating (9th Congressional District)
2351 Rayburn House Office Building
Washington, D.C. 20515
Phone: (202) 225-3111; Fax: (202) 225-5658
Website: keating.house.gov

Other Resources

• See which federal legislation we support and oppose.
• Find out who represents you at wheredoivotema.com or congress.gov/members/find-your-member.
• For more information on elected officials, bill texts, hearings, and more, visit the websites of the U.S. Senate, the U.S. House of Representatives, or Congress.
• Read our tips for engaging with legislators.
• View the Massachusetts Congressional Delegation’s past scores on the Humane World Action Fund scorecard.
• If you aren’t already a member, join our Animal Action Team!