- Lead
- 31,021
- Total
- 56,589
- vs nation
- D+56.3
Maryland 21st State House District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 29,905
- Total
- 50,876
- vs nation
- D+54.3
- Lead
- 28,065
- Total
- 47,965
- vs nation
- D+56.4
- Lead
- 27,687
- Total
- 48,165
- vs nation
- D+53.6
- Lead
- 25,469
- Total
- 46,964
- vs nation
- D+47.0
- Lead
- 14,651
- Total
- 42,439
- vs nation
- D+37.0
- Lead
- 11,540
- Total
- 36,743
- vs nation
- D+30.9
- Lead
- 7,277
- Total
- 33,469
- vs nation
- D+13.2
Key facts
- 2024 presidential margin
- D+54.8MIT Election Lab
- Population
- 133,4022024 5-year
- Population density
- 1,965 / sq mi2024 5-year · TIGER/Line
- Land area
- 67.9 sq miTIGER/Line
- Median household income
- $101,9492024 5-year
- White (non-Hispanic)
- 31.1%2024 5-year
- Black
- 29.9%2024 5-year
- Hispanic / Latino
- 23.0%2024 5-year
- Peak Democratic margin
- D+58.8 in 2020MIT Election Lab
- Peak Republican margin
- R+47.1 in 1972MIT Election Lab
- Most similar
- State House District 23, VA · twin score 96.3
presidential history
Party record book
Maryland 21st State House District · the strongest Democratic and Republican presidential performances recorded here, measured three ways.
1892–2024 (partial returns from 1876) · 38 presidential cycles · 38 with a vote-share denominator · 34 with a national benchmark
Highest vote share
Largest share of the presidential candidate vote cast here.
Democratic
Joe Biden2020
77.8%
39,592 votes · D+58.8 · modeled estimate
Runner-up · Barack Obama, 2012 · 77.7%
Republican
Richard Nixon1972
72.9%
24,062 votes · R+47.1 · modeled estimate
Runner-up · Herbert Hoover, 1928 · 72.0%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Kamala Harris2024
42,711votes
75.5% of the vote · D+54.8 · modeled estimate
Runner-up · Joe Biden, 2020 · 39,592 votes
Republican
Richard Nixon1972
24,062votes
72.9% of the vote · R+47.1 · modeled estimate
Runner-up · Ronald Reagan, 1984 · 20,465 votes
Best relative to the U.S.
This Place’s margin against the national margin in the same election — positive when it leaned toward the party more than the country did.
Democratic
Hillary Clinton2016
+56.4pts D vs U.S.
Place D+58.5 · U.S. D+2.1 · modeled estimate
Runner-up · Kamala Harris, 2024 · +56.3 pts
Republican
Thomas E. Dewey1944
+36.3pts R vs U.S.
Place R+28.8 · U.S. D+7.5 · modeled estimate
Runner-up · William McKinley, 1896 · +35.8 pts
Current officeholders
State legislative officeholder from OpenStates nightly current-legislator data.
Senate and governor results are in the Office selector at the top of this page.
U.S. House
Each row is a county-allocated estimate of U.S. House votes for this district — county returns apportioned onto its boundary, not precinct-counted. “Vote lead” is the estimated local lead here, not necessarily the winner of the full contest.
Maryland 21st State House District sits in the Mid-Atlantic. In 2024 it voted Democratic.
Across the recorded series it reached a Democratic high of 58.8 points in 2020 and a Republican high of 47.1 points in 1972. Between 2020 and 2024 the district moved 4.0 points toward the Republican candidate; the 2024 margin was 54.8 points.
A population of 133,402, a 31% non-Hispanic-white share, and a median household income of $101,949 describe the district. The district's voting pattern over the last decade is most similar to that of State House District 23 and State Legislative District 46.
The state-house districts whose fingerprint — 2000–2024 trajectory, demographics, ancestry, religion — sits closest to this one, and why.
Twin score (0–100) = weighted cosine between tier-standardized fingerprints: presidential margins 2000–2024 with 12-yr trend and elasticity, ACS income, age, education, population and race, top reported ancestries, and religious adherence — chips name the closest-shared dimensions and the widest gap. Re-weight the groups in the twins explorer.
District research tools
Open the source-auditable district brief for electoral baseline, electorate, current-cycle coverage, geography, official dates, and methodology. Open campaign intelligence report → · Browse all comparisons →
Maryland 21st State House District. Akashic. https://akashic.app/sld-lower/24021/. Accessed May 20, 2026. License: CC BY 4.0.