- Lead
- 6,779
- Total
- 23,479
- vs nation
- R+27.4
South Carolina 21st State House District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 5,895
- Total
- 23,630
- vs nation
- R+29.4
- Lead
- 6,727
- Total
- 19,780
- vs nation
- R+36.1
- Lead
- 6,636
- Total
- 17,764
- vs nation
- R+41.2
- Lead
- 5,885
- Total
- 17,464
- vs nation
- R+41.0
- Lead
- 6,628
- Total
- 15,623
- vs nation
- R+40.0
- Lead
- 5,704
- Total
- 13,004
- vs nation
- R+44.4
- Lead
- 3,728
- Total
- 11,104
- vs nation
- R+42.1
Key facts
- 2024 presidential margin
- R+28.9MIT Election Lab
- Population
- 42,3042024 5-year
- Population density
- 1,741 / sq mi2024 5-year · TIGER/Line
- Land area
- 24.3 sq miTIGER/Line
- Median household income
- $106,4072024 5-year
- White (non-Hispanic)
- 72.8%2024 5-year
- Black
- 7.0%2024 5-year
- Hispanic / Latino
- 8.2%2024 5-year
- Peak Democratic margin
- D+96.6 in 1912MIT Election Lab
- Peak Republican margin
- R+67.9 in 1972MIT Election Lab
- Most similar
- State House District 73, GA · twin score 96.9
presidential history
Party record book
South Carolina 21st State House District · the strongest Democratic and Republican presidential performances recorded here, measured three ways.
1892–2024 (partial returns from 1876) · 38 presidential cycles · 38 with a vote-share denominator · 34 with a national benchmark
Highest vote share
Largest share of the presidential candidate vote cast here.
Democratic
Franklin D. Roosevelt1936
97.8%
658 votes · D+95.5 · modeled estimate
Runner-up · Franklin D. Roosevelt, 1932 · 96.8%
Republican
Richard Nixon1972
82.4%
4,596 votes · R+67.9 · modeled estimate
Runner-up · Ronald Reagan, 1984 · 76.9%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Joe Biden2020
8,643votes
36.6% of the vote · R+24.9 · modeled estimate
Runner-up · Kamala Harris, 2024 · 8,102 votes
Republican
Donald Trump2024
14,881votes
63.4% of the vote · R+28.9 · modeled estimate
Runner-up · Donald Trump, 2020 · 14,538 votes
Best relative to the U.S.
This Place’s margin against the national margin in the same election — positive when it leaned toward the party more than the country did.
Democratic
John W. Davis1924
+116.3pts D vs U.S.
Place D+91.1 · U.S. R+25.2 · modeled estimate
Runner-up · James M. Cox, 1920 · +113.7 pts
Republican
Barry Goldwater1964
+58.6pts R vs U.S.
Place R+36.0 · U.S. D+22.6 · modeled estimate
Runner-up · Richard Nixon, 1972 · +44.7 pts
Current officeholders
State legislative officeholder from OpenStates nightly current-legislator data.
Senate and governor results are in the Office selector at the top of this page.
U.S. House
Each row is a county-allocated estimate of U.S. House votes for this district — county returns apportioned onto its boundary, not precinct-counted. “Vote lead” is the estimated local lead here, not necessarily the winner of the full contest.
South Carolina 21st State House District sits in the Deep South. In 2024 it voted Republican.
Across the recorded series it reached a Democratic high of 96.6 points in 1912 and a Republican high of 67.9 points in 1972. Between 2020 and 2024 the district moved 3.9 points toward the Republican candidate; the 2024 margin was 28.9 points.
A population of 42,304, a 73% non-Hispanic-white share, and a median household income of $106,407 describe the district. The district's voting pattern over the last decade is most similar to that of State House District 73 and State House District 73.
The state-house 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.
District research tools
Open the source-auditable district brief for electoral baseline, electorate, current-cycle coverage, geography, official dates, and methodology. Open campaign intelligence report → · Browse all comparisons →
South Carolina 21st State House District. Akashic. https://akashic.app/sld-lower/45021/. Accessed May 20, 2026. License: CC BY 4.0.