Massachusetts's 3rd congressional district

Massachusetts's 3rd congressional district
Interactive map of district boundaries since January 3, 2023
Representative	Lori Trahan D–Westford
Population (2022)	781,020
Median household income	$91,476[1]
Ethnicity	60.7% White 21.8% Hispanic 8.1% Asian 4.1% Two or more races 3.9% Black 1.4% other
Cook PVI	D+11[2]

Massachusetts's 3rd congressional district is located in north-central and northeastern Massachusetts. The largest municipalities in the district are Lowell, Lawrence, Haverhill, Methuen, Billerica (partial), Fitchburg, and Marlborough.

Democrat Lori Trahan has represented the district since 2019.