- Lead
- 10,144
- Total
- 49,869
- vs nation
- R+18.9
South Carolina 31st State Senate District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 8,717
- Total
- 51,242
- vs nation
- R+21.5
- Lead
- 9,851
- Total
- 44,996
- vs nation
- R+24.0
- Lead
- 8,126
- Total
- 44,614
- vs nation
- R+22.1
- Lead
- 9,346
- Total
- 45,045
- vs nation
- R+28.0
- Lead
- 11,427
- Total
- 38,882
- vs nation
- R+26.9
- Lead
- 10,530
- Total
- 32,670
- vs nation
- R+32.8
- Lead
- 6,658
- Total
- 28,173
- vs nation
- R+32.2
Key facts
- 2024 presidential margin
- R+20.3MIT Election Lab
- Population
- 106,6812024 5-year
- Population density
- 156 / sq mi2024 5-year · TIGER/Line
- Land area
- 682 sq miTIGER/Line
- Median household income
- $63,7732024 5-year
- White (non-Hispanic)
- 58.4%2024 5-year
- Black
- 33.0%2024 5-year
- Hispanic / Latino
- 3.4%2024 5-year
- Peak Democratic margin
- D+98.1 in 1936MIT Election Lab
- Peak Republican margin
- R+46.2 in 1972MIT Election Lab
- Most similar
- State Senate District 23, GA · twin score 94.5
presidential history
Party record book
South Carolina 31st State Senate District · the strongest Democratic and Republican presidential performances recorded here, measured three ways.
1892–2024 · 34 presidential cycles
Highest vote share
Largest share of the presidential candidate vote cast here.
Democratic
Franklin D. Roosevelt1936
99.1%
2,630 votes · D+98.1 · modeled estimate
Runner-up · Franklin D. Roosevelt, 1932 · 98.5%
Republican
Richard Nixon1972
72.8%
16,314 votes · R+46.2 · modeled estimate
Runner-up · George H. W. Bush, 1988 · 68.5%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Joe Biden2020
20,963votes
40.9% of the vote · R+17.0 · modeled estimate
Runner-up · Kamala Harris, 2024 · 19,537 votes
Republican
Donald Trump2024
29,681votes
59.5% of the vote · R+20.3 · modeled estimate
Runner-up · Donald Trump, 2020 · 29,680 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
James M. Cox1920
+113.4pts D vs U.S.
Place D+87.2 · U.S. R+26.2 · modeled estimate
Runner-up · Alton B. Parker, 1904 · +112.7 pts
Republican
Barry Goldwater1964
+57.6pts R vs U.S.
Place R+35.0 · U.S. D+22.6 · modeled estimate
Runner-up · George W. Bush, 2000 · +32.8 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.
With roughly 107,000 residents and a 13-point Republican lean in 2024, South Carolina Senate District 31 sits firmly in the state's competitive-but-red interior, where suburban growth and rural tradition shape the electorate in roughly equal measure.
Across the recorded series it reached a Democratic high of 98.1 points in 1936 and a Republican high of 46.2 points in 1972. Between 2020 and 2024 the district moved 3.3 points toward the Republican candidate; the 2024 margin was 20.3 points.
A population of 106,681, a 58% non-Hispanic-white share, and a median household income of $63,773 describe the district. The district's voting pattern over the last decade is most similar to that of State Senate District 23 and State Senate District 18.
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.
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 31st State Senate District. Akashic. https://akashic.app/sld-upper/45031/. Accessed May 20, 2026. License: CC BY 4.0.