Massachusetts' 3rd Congressional District
Massachusetts · MA-03
Massachusetts' 3rd Congressional District is one of 9 U.S. House districts in Massachusetts, represented in Congress by Lori Trahan (Democrat). It is home to roughly 782,860 people, with a median age of 39.3. The population is about 61% White. The median household income is $98,140, and 40% of adults 25 and older hold a bachelor’s degree or higher. In the 2024 presidential election it voted solidly Democratic (D+19).
Representative
Current U.S. House member (source: house.gov).
Geography
MA-03 is shown in red. Click a neighboring district to open it, or zoom out to explore the country.
By the Polsby-Popper measure, MA-03 is irregular in shape compared with other districts.
Presidential results
Two-party presidential vote by district (source: The Downballot).
Who lives here
U.S. Census Bureau, American Community Survey (5-year estimates).
Economy & education
U.S. Census Bureau, American Community Survey (5-year estimates).