Your Voice in Government
Legislators
Who Represents Waltham
Waltham is split between two state House districts, so the representative for your street depends on your ward and precinct. One state senator covers the entire city in the Massachusetts Senate. In Washington, all of Waltham is represented by one member of Congress and the Commonwealth’s two U.S. senators.
State Senator
Senator Michael J. Barrett, a Democrat, represents the Third Middlesex District, which covers all of Waltham. He carries the whole city’s voice into the chamber, where senators write state law on housing, transportation, and the school funding that reaches Waltham’s classrooms.
State Representatives
Two House districts divide Waltham. Use the lookup tools below to find which one covers your address.
9th Middlesex District · Democrat
Thomas M. Stanley
10th Middlesex District · Democrat
John J. Lawn, Jr.
Find Your Exact Legislator
Because Waltham is split, look up your own address to find your representative:
In Washington
All of Waltham sits in the 5th Congressional District, represented by U.S. Representative Katherine M. Clark, a Democrat who serves as House Democratic Whip, part of her party’s national leadership. Massachusetts is represented in the U.S. Senate by Elizabeth Warren, the senior senator, and Edward J. Markey, the junior senator. Both are Democrats.
Sources
Massachusetts Legislature (malegislature.gov). Verified July 2026.
Open States (Plural). Verified July 2026.
What this seat decides
The state and federal seats
Your State Representative and your State Senator. State law: the driving age, the minimum wage, the bottle deposit, and Chapter 70, the formula that decides how much state money your schools get. They also carry a home rule petition to the State House when your town votes for something state law does not yet allow it to do.
Your member of Congress and your two US Senators. Federal law and federal money, and help with a federal agency like Social Security, the VA, or immigration when someone in your family needs it. They also nominate candidates to the US service academies.
Knowing who represents you is the first step. Learn how to write to them so it lands.