Massachusetts' 9th Congressional District
Massachusetts · MA-09
Massachusetts' 9th Congressional District is one of 9 U.S. House districts in Massachusetts, represented in Congress by William Keating (Democrat). It is home to roughly 785,141 people, with a median age of 46.8. The population is about 83% White. The median household income is $97,543, and 42% of adults 25 and older hold a bachelor’s degree or higher. In the 2024 presidential election it voted leaning Democratic (D+11).
Representative
Current U.S. House member (source: house.gov).
Geography
MA-09 is shown in red. Click a neighboring district to open it, or zoom out to explore the country.
Covering 1,370 square miles, MA-09 is the 258th-largest of the 435 congressional districts by land area. With about 573 residents per square mile, it is a mix of small cities, suburbs and countryside. Its shape is very irregular: the district's Polsby-Popper score of 0.05 ranks 432nd of 435 nationally, where 1st is the most compact.
Presidential results
In the 2024 presidential election, 55% of MA-09 voters backed Kamala Harris and 44% Donald Trump — a D+11 margin. That is a 7.0-point shift toward the Republicans from 2020, when the district voted D+18.
Two-party presidential vote by district (source: The Downballot).
Who lives here
The median resident of the district is 46.8 years old, making this one of the oldest districts in the nation by median age; 18.3% of residents are under 18 and 23.8% are 65 or older. About 9.4% of residents were born outside the United States, and 12.9% speak a language other than English at home.
U.S. Census Bureau, American Community Survey (5-year estimates).
Economy & education
At $97,543, the district's median household income ranks 85th of 435 districts nationwide. The typical owner-occupied home is worth $528,727, and the median rent is $1,358 a month. 8% of residents live below the poverty line, and workers average a 30.2-minute commute (13.8% work from home).
U.S. Census Bureau, American Community Survey (5-year estimates).