state senate districtDelaware 21st State Senate District
presidential margin
2004–2024 · Democratic minus Republican
2004R+30.8
2008R+17.5
2012R+25.6
2016R+36.4
2020R+30.3
2024R+36.7
net swing · 2004→2024R+5.9R+30.8 → R+36.7
vs. U.S. · 2024R+35.2R+36.7 vs R+1.5
presidential returns
2024 turnout 58.6% of 37,695 citizens 18+
Year
Democrat
Republican
Others
Total
CVAP
Turnout
2024
6,852
14,960
273
22,085
37,695
58.6%
2020
7,231
13,652
282
21,165
33,950†
62.3%
2016
5,698
12,649
772
19,119
30,689†
62.3%
2012
6,413
10,898
176
17,487
28,314†
61.8%
2008
7,283
10,425
286
17,994
26,371†
68.2%
2004
5,375
10,223
120
15,718
24,429†
64.3%
† 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
GroupDE SD 21DelawareUnited States
Irish15.6%14.8%9.4%
German13.7%12.4%12.5%
English13.1%10.5%9.5%
Italian7.7%8.6%4.8%
American6.3%4.7%5.3%
Polish3.4%4.0%2.2%
Scottish2.0%1.7%1.3%
French1.3%1.2%1.6%
African American†14.9%18.0%9.9%
Haitian1.2%0.5%0.3%
African0.5%0.9%0.5%
Jamaican0.5%0.7%0.4%
Guatemalan3.6%1.2%0.5%
Mexican3.0%3.6%11.3%
Puerto Rican1.5%3.2%1.8%
Honduran0.6%—0.3%
Salvadoran0.5%0.2%0.7%
Dominican0.3%0.7%0.7%
Cuban0.2%0.2%0.7%
Spanish0.2%0.2%—
Asian Indian0.3%1.7%1.4%
Filipino0.3%0.5%0.9%
Chinese0.2%0.8%1.3%
Vietnamese0.2%0.2%0.6%
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
DE SD 21
Delaware
United States
Median age
39.9
42.4
39.1
Age 18–24
6.1%
8.4%
9.2%
Age 65 and older
30.2%
20.6%
17.2%
Household economy
Measure
DE SD 21
Delaware
United States
Median household income
$66,618
$84,954
$84,427
Poverty rate
15.7%
10.4%
12.5%
Bachelor's degree or higher (25+)
33.0%
35.8%
35.6%
Languages at home
Measure
DE SD 21
Delaware
United States
Speaks a non-English language at home
13.0%
15.1%
22.3%
Spanish
9.3%
7.9%
13.6%
French (incl. Cajun & Haitian)
1.1%
1.0%
0.7%
Religious landscape
Measure
DE SD 21
Delaware
United States
Catholic
—
19.8%
18.6%
Evangelical Protestant
—
9.1%
16.5%
Unclaimed / not counted
—
58.8%
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.
Delaware 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
−30.8%
2008
−17.5%
2012
−25.6%
2016
−36.4%
2020
−30.3%
2024
−36.7%
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. † 2004, 2012 sub-county results are estimated: the source's block-level detail for these cycles 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
R
31.0%Harris6,852
67.7%Trump14,960
1.2%
R+36.7
R+6.4
R+35.2
22,085
R
34.2%Biden7,231
64.5%Trump13,652
1.3%
R+30.3
D+6.0
R+34.8
21,165
R
29.8%Clinton5,698
66.2%Trump12,649
4.0%
R+36.4
R+10.7
R+38.4
19,119
R
36.7%Obama6,413
62.3%Romney10,898
1.0%
R+25.6
R+8.2
R+29.5
17,487
R
40.5%Obama7,283
57.9%McCain10,425
1.6%
R+17.5
D+13.4
R+24.7
17,994
R
34.2%Kerry5,375
65.0%Bush10,223
0.8%
R+30.8
—
R+28.4
15,718
current representation
Current officeholders
RBryant RichardsonState Senate · 21
State legislative officeholder from OpenStates nightly current-legislator data.
With a 2024 presidential margin of D+18.4 in a state already tilting blue, District 21's roughly 49,000 residents make it a reliable anchor for Democratic candidates in the General Assembly.
Across the recorded series it reached a Republican high of 36.7 points in 2024. Between 2020 and 2024 the district moved 6.4 points toward the Republican candidate; the 2024 margin was 36.7 points.
A population of 48,979, a 65% non-Hispanic-white share, and a median household income of $66,618 describe the district. The district's voting pattern over the last decade is most similar to that of State Senate District 15 and State Senate District 18.
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.
Delaware 21st State Senate District. Akashic. https://akashic.app/sld-upper/10021/. Accessed May 20, 2026. License: CC BY 4.0.
How did Delaware 21st State Senate District vote in 2024?
In 2024, Delaware 21st State Senate District voted Republican by 36.7 points (R+36.7), carried by the Republican candidate. Out of 22,085 votes cast, 6,852 went Democratic and 14,960 went Republican.
How many people live in Delaware 21st State Senate District?
Delaware 21st State Senate District has a population of 48,979 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Delaware 21st State Senate District?
Median household income in Delaware 21st State Senate District is $66,618 — below the national median of $80,734. The Delaware state median is $84,954.
What is the political history of Delaware 21st State Senate District?
Akashic tracks 6 presidential elections in Delaware 21st State Senate District from 2004 to 2024. Of those, 0 went Democratic and 6 went Republican.
