Maryland's 1st Congressional District
Maryland · MD-01
Maryland's 1st Congressional District is one of 8 U.S. House districts in Maryland, represented in Congress by Andy Harris (Republican). It is home to roughly 781,150 people, with a median age of 41.8. The population is about 72% White. The median household income is $93,230, and 34% of adults 25 and older hold a bachelor’s degree or higher. In the 2024 presidential election it voted solidly Republican (R+17).
Representative
Current U.S. House member (source: house.gov).
Geography
MD-01 is shown in red. Click a neighboring district to open it, or zoom out to explore the country.
Covering 4,215 square miles, MD-01 is the 166th-largest of the 435 congressional districts by land area. With about 185 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 0.06 ranks 428th of 435 nationally, where 1st is the most compact.
Presidential results
In the 2024 presidential election, 40% of MD-01 voters backed Kamala Harris and 57% Donald Trump — a R+17 margin. That is a 2.0-point shift toward the Republicans from 2020, when the district voted R+15.
Two-party presidential vote by district (source: The Downballot).
Who lives here
The median resident of the district is 41.8 years old; 21.5% of residents are under 18 and 19.2% are 65 or older. About 6.1% of residents were born outside the United States, and 8.4% speak a language other than English at home.
U.S. Census Bureau, American Community Survey (5-year estimates).
Economy & education
At $93,230, the district's median household income ranks 105th of 435 districts nationwide. The typical owner-occupied home is worth $341,323, and the median rent is $1,325 a month. 9.5% of residents live below the poverty line, and workers average a 31.1-minute commute (11.6% work from home).
U.S. Census Bureau, American Community Survey (5-year estimates).