Maryland's 3rd Congressional District
Maryland · MD-03
Maryland's 3rd Congressional District is one of 8 U.S. House districts in Maryland, represented in Congress by Sarah Elfreth (Democrat). It is home to roughly 774,455 people, with a median age of 39.7. The population is about 58% White. The median household income is $129,109, and 53% of adults 25 and older hold a bachelor’s degree or higher. In the 2024 presidential election it voted solidly Democratic (D+24).
Representative
Current U.S. House member (source: house.gov).
Geography
MD-03 is shown in red. Click a neighboring district to open it, or zoom out to explore the country.
Covering 530 square miles, MD-03 is the 320th-largest of the 435 congressional districts by land area. With about 1,461 residents per square mile, it is a largely suburban district. Its shape is irregular: the district's Polsby-Popper score of 0.27 ranks 224th of 435 nationally, where 1st is the most compact.
Presidential results
In the 2024 presidential election, 60% of MD-03 voters backed Kamala Harris and 37% Donald Trump — a D+24 margin. That is a 2.0-point shift toward the Republicans from 2020, when the district voted D+26.
Two-party presidential vote by district (source: The Downballot).
Who lives here
The median resident of the district is 39.7 years old; 22.9% of residents are under 18 and 15.8% are 65 or older. About 14.9% of residents were born outside the United States, and 19.1% speak a language other than English at home.
U.S. Census Bureau, American Community Survey (5-year estimates).
Economy & education
At $129,109, the district's median household income ranks 19th of 435 districts nationwide. The typical owner-occupied home is worth $490,434, and the median rent is $1,947 a month. 5.4% of residents live below the poverty line, and workers average a 31.2-minute commute (19% work from home).
U.S. Census Bureau, American Community Survey (5-year estimates).