Your Voice in Government
Legislators
Who Represents Watertown
Watertown is split between two state House districts, so the representative for your street depends on your precinct. One state senator covers the whole city, and in Washington all of Watertown is represented by one member of Congress and the Commonwealth’s two U.S. senators. Your member of Congress, Katherine Clark, is the House Democratic Whip, the second-ranking Democrat in the chamber.
State Senator
Suffolk & Middlesex District · Democrat
William N. Brownsberger
Senator Brownsberger, a Democrat from Belmont, has represented the Suffolk and Middlesex district since 2013 and serves as President Pro Tempore of the Senate. A lawyer by training, he covers all of Watertown along with neighboring communities.
State Representatives
Two House districts divide Watertown. Use the lookup tools below to find which one covers your address.
Find Your Exact Legislator
Because Watertown is split, look up your own address to find your representative:
In Washington
5th Congressional District · Democrat · House Democratic Whip
Katherine M. Clark
All of Watertown sits in the 5th Congressional District, represented by U.S. Representative Katherine Clark, a Democrat from Melrose who has held the seat since 2013 and now serves as House Democratic Whip, the second-ranking Democrat in the chamber. Massachusetts is represented in the U.S. Senate by Elizabeth Warren, the senior senator, and Edward J. Markey, the junior senator. Both were first elected to the Senate in the 2010s.
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.