akashic
1876–2024
State Senate District 21·Delaware

Delaware 21st State Senate District has voted Republican in seven straight presidential cycles.

One of Delaware's most Democratic-leaning legislative districts

1876 — 2024·38 elections
DE
Latest
R+11
in 2024
Archetype
Republican loyalist
since the recent cycles
Population
76,897
2024 ACS

Delaware 21st State Senate District, Delaware: Republican loyalist district. In 2024, voted R+11%. Republican peak: R+35 in 1984.

Key facts

2024 presidential margin
R+11MIT Election Lab
Political archetype
Republican loyalistAkashic typology
Population
76,8972024 5-year
Median household income
$81,4972024 5-year
White (non-Hispanic)
74.1%2024 5-year
Black
9.9%2024 5-year
Hispanic / Latino
11.5%2024 5-year
Peak Democratic margin
D+19 in 1884MIT Election Lab
Peak Republican margin
R+35 in 1984MIT Election Lab
2024 results by constituent county
1 counties · 0 D · 1 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
R
−11.0%
19,49824,36144,324
R
−11.2%
17,05121,42738,911
R
−22.0%
11,83218,83431,833
R
−13.0%
12,02515,67828,043
R
−8.6%
12,12314,42126,794
R
−21.7%
9,05414,13923,389
R
−7.4%
8,94610,41419,940
D
+1.9%
6,9766,67415,646
R
−2.4%
5,7686,14915,812
R
−24.3%
4,9658,16113,168
R
−34.9%
4,1008,52412,662
R
−9.4%
4,8055,85811,244
D
+3.9%
5,5815,16010,850
R
−30.4%
3,4996,60710,229
R
−11.9%
3,5114,6989,947
D
+11.3%
5,4064,3039,738
R
−2.9%
4,6544,9319,654
R
−9.6%
4,1205,0009,154
R
−6.8%
4,5295,1919,783
R
−8.4%
3,4664,1027,605
R
−5.4%
3,2123,5786,812
D
+5.4%
3,9733,5667,538
D
+3.2%
3,8503,6097,470
D
+8.5%
3,7963,1987,010
R
−28.5%
2,1553,8766,047
R
−7.6%
2,6073,0445,719
R
−7.1%
2,5412,9325,473
R
−3.3%
1,6991,8153,533
D
+9.6%
1,6701,3433,421
R
−7.8%
1,5081,7663,316
R
−14.4%
1,3261,7793,150
R
−6.3%
1,3131,4922,845
R
−8.3%
1,1511,3662,583
D
+1.6%
1,2871,2472,565
R
−0.8%
1,1981,2172,448
D
+19.1%
1,3389082,249
D
+8.3%
1,2011,0152,241
D
+11.6%
1,0508311,881

Demographics

Race, ethnicity, and ancestry
Click any group to see the ancestries typically reported within it.
Irish
16.8%
German
14.8%
English
14.1%
Italian
8.3%
American
6.8%
Polish
3.7%
Scottish
2.2%
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: 51.9 in this county, 39.1 nationally
Male
Age
Female
0.9%
85+
1.4%
4.3%
75–84
4.6%
8.9%
65–74
10.1%
7.5%
55–64
8.8%
4.9%
45–54
5.1%
4.8%
35–44
4.9%
4.8%
25–34
4.7%
3.2%
18–24
2.9%
6.8%
5–17
6.6%
2.4%
<5
2.3%
Source · American Community Survey 5-year estimates, 2024 release.
Median household income
2024 inflation-adjusted dollars
$81,497
State Senate District 21 ranks near the middle of US counties.
State Senate District 21$81,497
Delaware$84,954
United States$80,734
Source · American Community Survey 5-year estimates, 2024 release.
Poverty rate
All persons below federal poverty line
10.9%
Children face moderate poverty.
Children under 1818.9%
Working age (18–64)9.3%
Seniors (65+)8.1%
Source · American Community Survey 5-year estimates, 2024 release.
Language at home
Population aged 5 and older
87.0%
speak English only
Spanish9.3%
Other Indo-European2.5%
Asian & Pacific Islander0.9%
Other languages0.4%
Source · ACS 5-year estimates, 2024.
Religious adherents
Adherents per capita by tradition
Catholic & Orthodox
14.6%
Methodist
8.8%
Other Christian
6.6%
Pentecostal & Holiness
2.4%
Mainline Protestant
1.8%
Baptist
0.5%
Non-Christian
0.1%
Source · 2020 US Religion Census. Remaining 65.2% of residents not counted as adherents by any reporting body.

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.

The Republican margin in Delaware 21st State Senate District reached its widest at thirty-five points in 1984. The margin in 2024 was eleven points, in line with the district's deep historical pattern.

Its loyalty is rooted in its place. Median household income of $81,497, a 74% non-Hispanic-white share, and a population of 76,897 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 Senate District 21, Delaware. Akashic. https://akashic.app/sld-upper/10021/. Accessed May 20, 2026. License: CC BY 4.0.
License: CC BY 4.0

Frequently asked questions

How did State Senate District 21, Delaware vote in 2024?
In 2024, State Senate District 21, Delaware voted Republican by 11.0 points (R+11), carried by the Republican candidate. Out of 44,324 votes cast, 19,498 went Democratic and 24,361 went Republican.
What is State Senate District 21, Delaware's political archetype?
Akashic classifies State Senate District 21, Delaware as a "Republican loyalist" district based on its long-arc presidential voting pattern. Across 38 elections in the dataset, the district has voted Democratic 11 times, Republican 27 times, and other 0 times.
When did State Senate District 21, Delaware last vote Democratic?
The most recent presidential election in which State Senate District 21, Delaware voted Democratic was 1996.
How many people live in State Senate District 21, Delaware?
State Senate District 21, Delaware has a population of 76,897 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in State Senate District 21, Delaware?
Median household income in State Senate District 21, Delaware is $81,497 — above the national median of $80,734. The Delaware state median is $84,954.
What is the political history of State Senate District 21, Delaware?
Akashic tracks 38 presidential elections in State Senate District 21, Delaware from 1876 to 2024. Of those, 11 went Democratic and 27 went Republican. The district's archetype — "Republican loyalist" — captures the overall trajectory of that voting record.