state senate districtMaryland 21st State Senate District
presidential margin
2004–2024 · Democratic minus Republican
2004D+23.3
2008D+45.0
2012D+51.9
2016D+57.2
2020D+60.1
2024D+55.3
net swing · 2004→2024D+32.0D+23.3 → D+55.3
vs. U.S. · 2024D+56.8D+55.3 vs R+1.5
presidential returns
2024 turnout 64.7% of 86,794 citizens 18+
Year
Democrat
Republican
Others
Total
CVAP
Turnout
2024
42,720
11,689
1,714
56,123
86,794
64.7%
2020
39,586
9,701
427
49,714
83,597†
59.5%
2016
37,128
9,086
2,794
49,008
81,452†
60.2%
2012
34,196
10,619
574
45,389
77,546†
58.5%
2008
29,844
11,132
561
41,537
74,327†
55.9%
2004
23,554
14,572
494
38,620
71,109†
54.3%
† Citizen voting-age population estimated for prior cycles from the constituent-county ACS trend anchored to the current figure. Source: ACS 5-year, table B05003.
——
D+60R+60
20042024
Boundary by 2024 margin · Precinct returns · VEST · MIT Election Lab
People and households
Who lives here
Exact values for this place, its state, and the United States.
Race · ethnicity · ancestry
Communities and origins
GroupMD SD 21MarylandUnited States
German8.0%11.4%12.5%
Irish7.2%9.3%9.4%
English6.5%8.5%9.5%
American3.9%4.1%5.3%
Italian3.4%4.4%4.8%
Polish1.7%2.6%2.2%
Scottish1.2%1.1%1.3%
French0.9%1.1%1.6%
African American†24.9%23.6%9.9%
Nigerian1.5%1.1%0.2%
African1.1%1.2%0.5%
Jamaican0.9%0.7%0.4%
Ethiopian0.3%0.7%—
Ghanaian0.3%0.3%—
Haitian0.3%0.3%0.3%
Sierra Leonean0.2%——
Salvadoran8.6%3.5%0.7%
Mexican3.7%2.0%11.3%
Guatemalan2.9%1.2%0.5%
Puerto Rican1.6%1.2%1.8%
Honduran1.3%0.7%0.3%
Dominican0.8%0.5%0.7%
Nicaraguan0.4%——
Colombian0.4%0.4%0.4%
Filipino2.8%0.9%0.9%
Asian Indian2.5%1.7%1.4%
Chinese1.7%1.3%1.3%
Korean1.1%0.8%0.4%
Vietnamese0.8%0.4%0.6%
Pakistani0.6%0.3%—
Hispanic or Latino counts residents of any race; the race groups count only their non-Hispanic residents, so the groups are mutually exclusive and sum to 100%. Expand a row to see ancestries reported within that group.
Age and life stage
Measure
MD SD 21
Maryland
United States
Median age
32.6
39.5
39.1
Age 18–24
8.9%
8.5%
9.2%
Age 65 and older
15.3%
16.6%
17.2%
Household economy
Measure
MD SD 21
Maryland
United States
Median household income
$101,949
$103,678
$84,427
Poverty rate
14.1%
9.5%
12.5%
Bachelor's degree or higher (25+)
39.9%
43.5%
35.6%
Languages at home
Measure
MD SD 21
Maryland
United States
Speaks a non-English language at home
24.7%
21.1%
22.3%
Spanish
15.0%
9.6%
13.6%
French (incl. Cajun & Haitian)
1.6%
1.3%
0.7%
Other Indo-European
1.5%
2.5%
2.0%
Other languages
3.4%
2.5%
0.8%
Religious landscape
Measure
MD SD 21
Maryland
United States
Catholic
—
14.7%
18.6%
Evangelical Protestant
—
11.2%
16.5%
Unclaimed / not counted
—
56.6%
51.5%
American Community Survey 2024 5-year (CVAP, income, age, poverty, education, language, race, ancestry) · presidential returns from MIT Election Lab through 2024 · 2020 U.S. Religion Census (ASARB) — congregational adherents; unclaimed is the residual not counted by congregations.
Maryland 21st State Senate District
presidential history
Presidential margin, 2004–2024
Democratic minus Republican, by election
Presidential margin over time
Year
Margin (D minus R)
2004
+23.3%
2008
+45.0%
2012
+51.9%
2016
+57.2%
2020
+60.1%
2024
+55.3%
DemocraticRepublican
6 presidential elections
Third column names the leading third-party or independent finisher. Source · MIT Election Lab · ICPSR · VEST (precinct-level 2024). Swing · margin change from the prior cycle. vs U.S. · margin relative to the national result that year. Third-party votes in 2012 are allocated from certified county totals by this place's share of each county's two-party vote — that cycle's precinct source records two-party splits. † 2004 sub-county results are estimated: the source's block-level detail for this cycle was unreliable — either county/municipality-level consolidated reporting (COVID-era) or a precinct-to-block allocation that misplaced votes — so the figures are allocated from the constituent county totals in proportion to the place and scaled to certified totals.
Year
Won
Democratic
Republican
Other
Margin
Swing
vs U.S.
Total
D
76.1%Harris42,720
20.8%Trump11,689
3.1%
D+55.3
R+4.8
D+56.8
56,123
D
79.6%Biden39,586
19.5%Trump9,701
0.9%
D+60.1
D+2.9
D+55.7
49,714
D
75.8%Clinton37,128
18.5%Trump9,086
5.7%
D+57.2
D+5.3
D+55.1
49,008
D
75.3%Obama34,196
23.4%Romney10,619
1.3%
D+51.9
D+6.9
D+48.1
45,389
D
71.8%Obama29,844
26.8%McCain11,132
1.4%
D+45.0
D+21.8
D+37.8
41,537
D
61.0%Kerry23,554
37.7%Bush14,572
1.3%
D+23.3
—
D+25.7
38,620
current representation
Current officeholders
DJim RosapepeState Senate · 21
State legislative officeholder from OpenStates nightly current-legislator data.
Maryland's 21st Senate District posts a modest Democratic lean by state standards, suggesting a competitive suburban electorate that has historically resisted the double-digit margins seen in neighboring urban districts.
Across the recorded series it reached a Democratic high of 60.1 points in 2020. Between 2020 and 2024 the district moved 4.8 points toward the Republican candidate; the 2024 margin was 55.3 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 Senate District 46 and State Senate District 44.
Akashic
Political twins — state-senate districts
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.
Compare two places, side by side
Twelve curated comparisons line up election history, demographics, and the divergence story for two places at a glance. Browse all comparisons →
Cite this page
All citations released under CC BY 4.0. Attribution: Akashic Intelligence.
Maryland 21st State Senate District. Akashic. https://akashic.app/sld-upper/24021/. Accessed May 20, 2026. License: CC BY 4.0.
How did Maryland 21st State Senate District vote in 2024?
In 2024, Maryland 21st State Senate District voted Democratic by 55.3 points (D+55.3), carried by the Democratic candidate. Out of 56,123 votes cast, 42,720 went Democratic and 11,689 went Republican.
How many people live in Maryland 21st State Senate District?
Maryland 21st State Senate District has a population of 133,402 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Maryland 21st State Senate District?
Median household income in Maryland 21st State Senate District is $101,949 — above the national median of $80,734. The Maryland state median is $103,678.
What is the political history of Maryland 21st State Senate District?
Akashic tracks 6 presidential elections in Maryland 21st State Senate District from 2004 to 2024. Of those, 6 went Democratic and 0 went Republican.
