Maryland 3rd Congressional District, Maryland: Bellwether district. In 2024, voted D+27%. Democratic peak: D+67 in 1912.
Key facts
- 2024 presidential margin
- D+27MIT Election Lab
- Political archetype
- BellwetherAkashic typology
- Population
- 663,9722024 5-year
- Median household income
- $137,3262024 5-year
- White (non-Hispanic)
- 55.6%2024 5-year
- Black
- 18.6%2024 5-year
- Hispanic / Latino
- 9.5%2024 5-year
- Peak Democratic margin
- D+67 in 1912MIT Election Lab
- Peak Republican margin
- R+40 in 1972MIT Election Lab
Constituent county margins for Congressional District 3, MDOne cell per constituent county, colored by 2024 presidential margin from deep red (Republican) through neutral to deep blue (Democratic), ordered bluest first.
R+60D+60
One cell per constituent county. Ordered by 2024 D-vs-R margin (bluest first). Hover for county-level numbers.
38 presidential elections
| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| D | 217,666 | 122,336 | 354,017 | ||
| D | 222,755 | 120,548 | 353,553 | ||
| D | 171,897 | 116,636 | 304,776 | ||
| D | 159,896 | 129,075 | 296,673 | ||
| D | 154,792 | 127,978 | 288,257 | ||
| R | 128,168 | 134,228 | 265,948 | ||
| R | 107,075 | 107,944 | 223,184 | ||
| R | 86,714 | 87,175 | 189,806 | ||
| R | 81,923 | 83,645 | 201,536 | ||
| R | 64,017 | 98,351 | 163,336 | ||
| R | 51,301 | 87,193 | 139,279 | ||
| R | 48,101 | 62,268 | 123,184 | ||
| R | 49,748 | 54,595 | 104,342 | ||
| R | 24,658 | 58,159 | 84,007 | ||
| R | 19,404 | 30,101 | 60,751 | ||
| D | 28,751 | 21,525 | 50,275 | ||
| R | 19,522 | 24,052 | 43,577 | ||
| R | 12,287 | 22,540 | 34,827 | ||
| R | 11,832 | 18,703 | 30,798 | ||
| R | 7,661 | 9,582 | 17,748 | ||
| R | 8,909 | 9,847 | 18,757 | ||
| D | 11,335 | 8,657 | 20,071 | ||
| D | 10,694 | 7,748 | 18,572 | ||
| D | 9,855 | 5,519 | 15,647 | ||
| R | 6,699 | 9,393 | 16,172 | ||
| D | 5,183 | 4,401 | 10,437 | ||
| R | 5,431 | 6,382 | 11,944 | ||
| D | 4,433 | 3,095 | 7,763 | ||
| D | 7,129 | 2,401 | 7,085 | ||
| — | 7,003 | 3,896 | 112 | ||
| — | 8,447 | 3,058 | 135 | ||
| — | 4,000 | 4,293 | 10 | ||
| R | 3,786 | 4,461 | 8,461 | ||
| D | 4,040 | 3,182 | 7,386 | ||
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Demographics
Race, ethnicity, and ancestry
Click any group to see the ancestries typically reported within it.
German
13.4%
Irish
11.7%
English
10.7%
Italian
5.7%
American
3.6%
Polish
3.3%
Scottish
1.9%
Source · American Community Survey 5-year estimates, 2024 release. Hispanic/Latino is an ethnicity that overlaps the race categories, so these shares can total more than 100%. Ancestry is a self-reported, multiple-response item; ancestry percentages do not sum to the parent race percentage.
Age distribution by sex
Median age: 39.5 in this county, 39.1 nationally
Male
Age
Female
85+
75–84
65–74
55–64
45–54
35–44
25–34
18–24
5–17
<5
Source · American Community Survey 5-year estimates, 2024 release.
Median household income
2024 inflation-adjusted dollars
$137,326
Congressional District 3 ranks near the middle of US counties.
Congressional District 3$137,326
Maryland$103,678
United States$80,734
Source · American Community Survey 5-year estimates, 2024 release.
Poverty rate
All persons below federal poverty line
5.4%
Child poverty is below the national average.
Children under 185.6%
Working age (18–64)5.1%
Seniors (65+)8.0%
Source · American Community Survey 5-year estimates, 2024 release.
Language at home
Population aged 5 and older
79.0%
speak English only
Asian & Pacific Islander6.8%
Spanish6.4%
Other Indo-European5.4%
Other languages2.4%
Source · ACS 5-year estimates, 2024.
Religious adherents
Adherents per capita by tradition
Source · 2020 US Religion Census. Remaining 61.3% of residents not counted as adherents by any reporting body.
Maryland 3rd Congressional District in the Mid-Atlantic has, for decades, voted very close to the way the country has voted. Its margins are typically narrow, and the candidate who carries Maryland 3rd Congressional District more often than not also wins the national popular vote.
The Democratic margin in Maryland 3rd Congressional District has rarely exceeded sixty-seven points in modern history; the Republican margin has rarely exceeded forty points. 2024 delivered the district to the Democratic candidate by twenty-seven points.
Its demographics resemble the country more than they resemble most districts. A 56% non-Hispanic-white share, a 5% poverty rate, and a median household income of $137,326 — all within the broad national range.
Cite this page
All citations released under CC BY 4.0. Attribution: Akashic Intelligence.
Congressional District 3, Maryland — The Long Memory. Akashic Intelligence — The Long Memory. https://tiers.akashic.app/cd/2403/. Accessed May 20, 2026. License: CC BY 4.0.
License: CC BY 4.0
Frequently asked questions
How did Congressional District 3, Maryland vote in 2024?
In 2024, Congressional District 3, Maryland voted Democratic by 26.9 points (D+27), carried by the Democratic candidate. Out of 354,017 votes cast, 217,666 went Democratic and 122,336 went Republican.
What is Congressional District 3, Maryland's political archetype?
Akashic classifies Congressional District 3, Maryland as a "Bellwether" district based on its long-arc presidential voting pattern. Across 38 elections in the dataset, the district has voted Democratic 13 times, Republican 18 times, and other 0 times.
When did Congressional District 3, Maryland last vote Republican?
The most recent presidential election in which Congressional District 3, Maryland voted Republican was 2004.
How many people live in Congressional District 3, Maryland?
Congressional District 3, Maryland has a population of 663,972 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Congressional District 3, Maryland?
Median household income in Congressional District 3, Maryland is $137,326 — above the national median of $80,734. The Maryland state median is $103,678.
What is the political history of Congressional District 3, Maryland?
Akashic tracks 38 presidential elections in Congressional District 3, Maryland from 1876 to 2024. Of those, 13 went Democratic and 18 went Republican. The district's archetype — "Bellwether" — captures the overall trajectory of that voting record.