- Lead
- 12,695
- Total
- 71,884
- vs nation
- D+19.1
Maryland 30th State Senate District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 14,232
- Total
- 72,492
- vs nation
- D+15.2
- Lead
- 5,659
- Total
- 57,779
- vs nation
- D+7.7
- Lead
- 4,397
- Total
- 56,574
- vs nation
- D+3.9
- Lead
- 3,430
- Total
- 56,483
- vs nation
- R+1.2
- Lead
- 2,388
- Total
- 51,622
- vs nation
- R+2.2
- Lead
- 197
- Total
- 43,528
- vs nation
- R+0.1
- Lead
- 249
- Total
- 37,325
- vs nation
- R+7.9
Key facts
- 2024 presidential margin
- D+17.7MIT Election Lab
- Population
- 126,3312024 5-year
- Population density
- 900 / sq mi2024 5-year · TIGER/Line
- Land area
- 140 sq miTIGER/Line
- Median household income
- $127,9662024 5-year
- White (non-Hispanic)
- 69.7%2024 5-year
- Black
- 11.4%2024 5-year
- Hispanic / Latino
- 12.1%2024 5-year
- Peak Democratic margin
- D+34.4 in 1932MIT Election Lab
- Peak Republican margin
- R+39.5 in 1972MIT Election Lab
- Most similar
- State Senate District 33, MD · twin score 92.9
presidential history
Party record book
Maryland 30th State Senate 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
Franklin D. Roosevelt1932
66.0%
2,325 votes · D+34.4 · modeled estimate
Runner-up · Samuel J. Tilden, 1876 · 63.7%
Republican
Richard Nixon1972
68.9%
14,375 votes · R+39.5 · modeled estimate
Runner-up · Ronald Reagan, 1984 · 62.3%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Joe Biden2020
42,462votes
58.6% of the vote · D+19.6 · modeled estimate
Runner-up · Kamala Harris, 2024 · 41,044 votes
Republican
Donald Trump2024
28,349votes
39.4% of the vote · D+17.7 · modeled estimate
Runner-up · Donald Trump, 2020 · 28,230 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
John W. Davis1924
+35.6pts D vs U.S.
Place D+10.5 · U.S. R+25.2 · modeled estimate
Runner-up · Alton B. Parker, 1904 · +33.6 pts
Republican
Richard Nixon1972
+16.4pts R vs U.S.
Place R+39.5 · U.S. R+23.2 · modeled estimate
Runner-up · George H. W. Bush, 1988 · +12.6 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's 30th Senate district, covering part of Prince George's County, has posted consistent double-digit Democratic margins in recent cycles, reflecting the county's heavily Black electorate and strong organizational infrastructure in communities south of Washington.
Across the recorded series it reached a Democratic high of 34.4 points in 1932 and a Republican high of 39.5 points in 1972. Between 2020 and 2024 the district moved 2.0 points toward the Republican candidate; the 2024 margin was 17.7 points.
A population of 126,331, a 70% non-Hispanic-white share, and a median household income of $127,966 describe the district. The district's voting pattern over the last decade is most similar to that of State Senate District 33 and State Senate District 20.
The state-senate 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 30th State Senate District. Akashic. https://akashic.app/sld-upper/24030/. Accessed May 20, 2026. License: CC BY 4.0.