akashic
1876–2024
State Representative District 21·Delaware

Delaware 21st State House District has voted Democratic in nine straight presidential cycles.

A reliably Democratic district anchored in suburban New Castle County

1876 — 2024·38 elections
DE
Latest
D+33
in 2024
Archetype
Democratic loyalist
since the recent cycles
Population
12,410
2024 ACS

Delaware 21st State House District, Delaware: Democratic loyalist district. In 2024, voted D+33%. Democratic peak: D+41 in 2008.

Key facts

2024 presidential margin
D+33MIT Election Lab
Political archetype
Democratic loyalistAkashic typology
Population
12,4102024 5-year
Median household income
$91,1662024 5-year
White (non-Hispanic)
54.2%2024 5-year
Black
25.6%2024 5-year
Hispanic / Latino
11.8%2024 5-year
Peak Democratic margin
D+41 in 2008MIT Election Lab
Peak Republican margin
R+36 in 1928MIT Election Lab
2024 results by constituent county
1 counties · 1 D · 0 R
R+60
D+60
One cell per constituent county. Ordered by 2024 D-vs-R margin (bluest first). Hover for county-level numbers.
38 presidential elections
Source · MIT Election Lab · ICPSR · VEST (precinct-level 2024).
YearWonMarginDemocraticRepublicanTotal
D
+32.6%
3,8771,9495,908
D
+37.1%
4,1881,8976,176
D
+29.6%
3,4981,8365,615
D
+34.1%
3,5881,7445,411
D
+40.6%
3,8391,6025,506
D
+22.0%
3,1391,9995,186
D
+23.0%
2,7391,6874,575
D
+21.1%
2,1221,3093,855
D
+12.8%
1,9651,4244,226
R
−7.8%
1,6991,9883,715
R
−14.6%
1,6372,1973,845
O
+0.0%
1,6511,6513,616
D
+4.4%
1,8791,7193,658
R
−17.6%
1,5072,1623,714
R
−1.0%
1,4701,5033,359
D
+25.2%
1,9701,1763,154
D
+2.8%
1,5751,4883,070
R
−11.5%
1,2111,5272,744
R
−3.5%
1,2541,3452,607
D
+0.7%
1,0331,0192,083
D
+13.5%
1,0658111,883
D
+11.4%
1,1208912,011
D
+11.0%
1,0168131,842
R
−9.4%
7068561,591
R
−35.8%
4821,0231,512
R
−30.4%
3837611,242
R
−19.7%
5217861,348
R
−3.9%
320347687
D
+15.8%
279179631
R
−7.2%
278322615
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Demographics

Race, ethnicity, and ancestry
Click any group to see the ancestries typically reported within it.
Irish
14.8%
German
11.7%
Italian
9.6%
English
9.2%
Polish
4.5%
American
3.2%
Scottish
1.5%
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: 39.3 in this county, 39.1 nationally
Male
Age
Female
0.7%
85+
1.2%
2.2%
75–84
2.8%
4.7%
65–74
5.5%
6.4%
55–64
7.0%
5.9%
45–54
6.3%
6.6%
35–44
6.7%
6.9%
25–34
7.0%
4.5%
18–24
4.5%
8.0%
5–17
7.8%
2.8%
<5
2.7%
Source · American Community Survey 5-year estimates, 2024 release.
Median household income
2024 inflation-adjusted dollars
$91,166
State Representative District 21 ranks near the middle of US counties.
State Representative District 21$91,166
Delaware$84,954
United States$80,734
Source · American Community Survey 5-year estimates, 2024 release.
Poverty rate
All persons below federal poverty line
10.1%
Child poverty is below the national average.
Children under 1813.7%
Working age (18–64)9.2%
Seniors (65+)8.9%
Source · American Community Survey 5-year estimates, 2024 release.
Language at home
Population aged 5 and older
82.7%
speak English only
Spanish8.3%
Other Indo-European3.9%
Asian & Pacific Islander3.1%
Other languages2.0%
Source · ACS 5-year estimates, 2024.
Religious adherents
Adherents per capita by tradition
Catholic & Orthodox
26.0%
Other Christian
7.7%
Non-Christian
4.1%
Methodist
3.3%
Mainline Protestant
3.1%
Baptist
2.2%
Pentecostal & Holiness
0.9%
Source · 2020 US Religion Census. Remaining 52.7% of residents not counted as adherents by any reporting body.

With a 2024 presidential margin of D+18.4, Delaware's 21st House district ranks among the state's more Democratic-leaning constituencies, reflecting the dense suburban and residential character typical of northern New Castle County.

The Democratic margin in Delaware 21st State House District reached its widest at forty-one points in 2008. The margin in 2024 was thirty-three points — still decisive.

Its loyalty is rooted in its place. Median household income of $91,166, a 54% non-Hispanic-white share, and a population of 12,410 together describe a district whose political habits are deeply settled.

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.
State Representative District 21, Delaware. Akashic. https://akashic.app/sld-lower/10021/. Accessed May 20, 2026. License: CC BY 4.0.
License: CC BY 4.0

Frequently asked questions

How did State Representative District 21, Delaware vote in 2024?
In 2024, State Representative District 21, Delaware voted Democratic by 32.6 points (D+33), carried by the Democratic candidate. Out of 5,908 votes cast, 3,877 went Democratic and 1,949 went Republican.
What is State Representative District 21, Delaware's political archetype?
Akashic classifies State Representative District 21, Delaware as a "Democratic loyalist" district based on its long-arc presidential voting pattern. Across 38 elections in the dataset, the district has voted Democratic 17 times, Republican 12 times, and other 1 times.
When did State Representative District 21, Delaware last vote Republican?
The most recent presidential election in which State Representative District 21, Delaware voted Republican was 1988.
How many people live in State Representative District 21, Delaware?
State Representative District 21, Delaware has a population of 12,410 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in State Representative District 21, Delaware?
Median household income in State Representative District 21, Delaware is $91,166 — above the national median of $80,734. The Delaware state median is $84,954.
What is the political history of State Representative District 21, Delaware?
Akashic tracks 38 presidential elections in State Representative District 21, Delaware from 1876 to 2024. Of those, 17 went Democratic and 12 went Republican. The district's archetype — "Democratic loyalist" — captures the overall trajectory of that voting record.