South Carolina 21st State Senate District, South Carolina: Democratic loyalist district. In 2024, voted D+35%. Democratic peak: D+98 in 1936.
Key facts
- 2024 presidential margin
- D+35MIT Election Lab
- Political archetype
- Democratic loyalistAkashic typology
- Population
- 192,2572024 5-year
- Median household income
- $63,7842024 5-year
- White (non-Hispanic)
- 40.4%2024 5-year
- Black
- 47.4%2024 5-year
- Hispanic / Latino
- 6.4%2024 5-year
- Peak Democratic margin
- D+98 in 1936MIT Election Lab
- Peak Republican margin
- R+29 in 1972MIT Election Lab
Constituent county margins for State Senate District 21, SCOne cell per constituent county, colored by 2024 presidential margin from deep red (Republican) through neutral to deep blue (Democratic), ordered bluest first.
R+60D+60
One cell per constituent county. Ordered by 2024 D-vs-R margin (bluest first). Hover for county-level numbers.
38 presidential elections
| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| D | 55,161 | 26,425 | 83,081 | ||
| D | 60,380 | 26,559 | 88,278 | ||
| D | 49,190 | 23,897 | 76,846 | ||
| D | 47,363 | 24,187 | 72,488 | ||
| D | 48,122 | 26,390 | 75,168 | ||
| D | 34,744 | 25,602 | 60,941 | ||
| D | 28,775 | 22,848 | 53,052 | ||
| D | 23,785 | 17,805 | 43,373 | ||
| D | 24,434 | 19,924 | 48,393 | ||
| R | 16,588 | 19,968 | 37,859 | ||
| R | 14,671 | 21,303 | 37,088 | ||
| R | 15,102 | 16,550 | 33,189 | ||
| D | 16,786 | 14,906 | 31,865 | ||
| R | 9,775 | 18,103 | 28,236 | ||
| R | 8,288 | 11,940 | 23,431 | ||
| R | 8,170 | 12,437 | 20,607 | ||
| R | 5,326 | 9,444 | 14,771 | ||
| O | 2,803 | 3,058 | 10,195 | ||
| R | 4,049 | 7,253 | 11,302 | ||
| O | 1,102 | 305 | 4,187 | ||
| D | 3,001 | 64 | 3,223 | ||
| D | 2,178 | 76 | 2,254 | ||
| D | 3,064 | 0 | 3,134 | ||
| D | 1,991 | 0 | 2,050 | ||
| D | 1,438 | 202 | 1,641 | ||
| D | 1,079 | 40 | 1,153 | ||
| D | 1,109 | 134 | 1,243 | ||
| D | 1,040 | 133 | 1,187 | ||
| D | 709 | 0 | 804 | ||
| D | 797 | 107 | 914 | ||
| D | 556 | 56 | 611 | ||
| D | 203 | 28 | 231 | ||
| D | 421 | 213 | 648 | ||
| D | 359 | 66 | 425 | ||
| — | — | — | — | ||
| — | — | — | — | ||
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Demographics
Race, ethnicity, and ancestry
Click any group to see the ancestries typically reported within it.
English
7.9%
German
7.4%
Irish
5.8%
American
4.4%
Italian
2.6%
Scottish
1.7%
French
1.4%
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: 34.4 in this county, 39.1 nationally
Male
Age
Female
85+
75–84
65–74
55–64
45–54
35–44
25–34
18–24
5–17
<5
Source · American Community Survey 5-year estimates, 2024 release.
Median household income
2024 inflation-adjusted dollars
$63,784
State Senate District 21 ranks near the middle of US counties.
State Senate District 21$63,784
South Carolina$69,324
United States$80,734
Source · American Community Survey 5-year estimates, 2024 release.
Poverty rate
All persons below federal poverty line
17.2%
Children face moderate poverty.
Children under 1822.5%
Working age (18–64)16.0%
Seniors (65+)11.4%
Source · American Community Survey 5-year estimates, 2024 release.
Language at home
Population aged 5 and older
91.3%
speak English only
Spanish4.3%
Other Indo-European1.9%
Asian & Pacific Islander1.8%
Other languages0.7%
Source · ACS 5-year estimates, 2024.
Religious adherents
Adherents per capita by tradition
Source · 2020 US Religion Census. Remaining 43.3% of residents not counted as adherents by any reporting body.
With a 2024 presidential margin of R+51.4, this district ranks among the most reliably one-sided in the state senate, suggesting a rural, low-density electorate where statewide competitive races rarely materialize.
The Democratic margin in South Carolina 21st State Senate District reached its widest at ninety-eight points in 1936. The margin in 2024 was thirty-five points — still decisive.
Its loyalty is rooted in its place. Median household income of $63,784, a 40% non-Hispanic-white share, and a population of 192,257 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, South Carolina. Akashic. https://akashic.app/sld-upper/45021/. Accessed May 20, 2026. License: CC BY 4.0.
License: CC BY 4.0
Frequently asked questions
How did State Senate District 21, South Carolina vote in 2024?
In 2024, State Senate District 21, South Carolina voted Democratic by 34.6 points (D+35), carried by the Democratic candidate. Out of 83,081 votes cast, 55,161 went Democratic and 26,425 went Republican.
What is State Senate District 21, South Carolina's political archetype?
Akashic classifies State Senate District 21, South Carolina as a "Democratic loyalist" district based on its long-arc presidential voting pattern. Across 38 elections in the dataset, the district has voted Democratic 24 times, Republican 8 times, and other 2 times.
When did State Senate District 21, South Carolina last vote Republican?
The most recent presidential election in which State Senate District 21, South Carolina voted Republican was 1988.
How many people live in State Senate District 21, South Carolina?
State Senate District 21, South Carolina has a population of 192,257 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, South Carolina?
Median household income in State Senate District 21, South Carolina is $63,784 — below the national median of $80,734. The South Carolina state median is $69,324.
What is the political history of State Senate District 21, South Carolina?
Akashic tracks 38 presidential elections in State Senate District 21, South Carolina from 1876 to 2024. Of those, 24 went Democratic and 8 went Republican. The district's archetype — "Democratic loyalist" — captures the overall trajectory of that voting record.