† Citizen voting-age population estimated for prior cycles; 2004 predates the ACS and is extrapolated. Source: ACS 5-year, table B05003.
——
D+60R+60
1 counties by 2024 margin · County returns · MIT Election Lab
People and households
Who lives here
Exact values for this place, its state, and the United States.
Race · ethnicity · ancestry
Communities and origins
GroupSeneca, SCSouth CarolinaUnited States
English17.0%12.1%9.5%
Irish13.9%9.1%9.4%
German12.0%9.4%12.5%
American9.1%8.2%5.3%
Scottish3.6%2.1%1.3%
Italian2.8%3.4%4.8%
Scotch-Irish2.0%1.4%—
Polish1.9%—2.2%
Mexican3.9%3.4%11.3%
Honduran0.6%0.4%0.3%
Puerto Rican0.4%1.0%1.8%
Bolivian0.3%——
Dominican0.2%—0.7%
Ecuadorian0.2%——
African American†4.8%23.4%9.9%
South African0.2%——
Hispanic or Latino counts residents of any race; the race groups count only their non-Hispanic residents, so the groups are mutually exclusive and sum to 100%. Expand a row to see ancestries reported within that group.
Age and life stage
Measure
Seneca, SC
South Carolina
United States
Median age
47.3
40.5
39.1
Age 18–24
7.3%
9.1%
9.2%
Age 65 and older
24.8%
18.9%
17.2%
Household economy
Measure
Seneca, SC
South Carolina
United States
Median household income
$62,388
$69,324
$84,427
Poverty rate
17.6%
14.1%
12.5%
Bachelor's degree or higher (25+)
28.7%
32.1%
35.6%
Languages at home
Measure
Seneca, SC
South Carolina
United States
Speaks a non-English language at home
5.1%
8.4%
22.3%
Spanish
3.9%
5.2%
13.6%
Religious landscape
Measure
Seneca, SC
South Carolina
United States
Catholic
8.3%
8.0%
18.6%
Evangelical Protestant
40.1%
28.6%
16.5%
Unclaimed / not counted
45.1%
47.5%
51.5%
American Community Survey 2024 5-year (CVAP, income, age, poverty, education, language, race, ancestry) · presidential returns from MIT Election Lab through 2024 · 2020 U.S. Religion Census (ASARB) — congregational adherents; unclaimed is the residual not counted by congregations.
Seneca, SC
presidential history
Presidential margin, 1892–2024
Democratic minus Republican, by election
Presidential margin over time
Year
Margin (D minus R)
1892
+44.3%
1896
+75.0%
1900
+85.4%
1904
+84.1%
1908
+73.4%
1912
+85.7%
1916
+87.2%
1920
+89.4%
1924
+95.8%
1928
+89.4%
1932
+99.2%
1936
+97.5%
1940
+83.5%
1944
+80.8%
1948
+27.1%
1952
+33.1%
1956
+54.2%
1960
+39.3%
1964
+34.4%
1968
−6.5%
1972
−58.2%
1976
+37.7%
1980
+14.9%
1984
−43.9%
1988
−40.3%
1992
−18.4%
1996
−15.6%
2000
−33.1%
2004
−37.8%
2008
−37.5%
2012
−42.6%
2016
−48.1%
2020
−47.4%
2024
−51.5%
DemocraticRepublican
34 presidential elections
Third column names the leading third-party or independent finisher. Source · MIT Election Lab · ICPSR · VEST (precinct-level 2024). Swing · margin change from the prior cycle. vs U.S. · margin relative to the national result that year.
Year
Won
Democratic
Republican
Other
Margin
Swing
vs U.S.
Total
R
23.6%Harris9,987
75.2%Trump31,772
1.2%
R+51.5
R+4.1
R+50.1
42,264
R
25.6%Biden10,414
73.0%Trump29,698
1.4%
R+47.4
D+0.7
R+51.9
40,668
R
23.8%Clinton7,998
71.9%Trump24,178
4.3%
R+48.1
R+5.5
R+50.2
33,635
R
27.9%Obama8,550
70.5%Romney21,611
1.6%
R+42.6
R+5.1
R+46.4
30,666
R
30.5%Obama9,481
68.0%McCain21,164
1.6%
R+37.5
D+0.3
R+44.8
31,132
R
30.5%Kerry8,395
68.3%Bush18,811
1.2%
R+37.8
R+4.8
R+35.4
27,532
R
32.1%Gore7,571
65.2%Bush15,364
2.7%
R+33.1
R+17.5
R+33.6
23,575
R
37.1%Clinton7,398
52.6%Dole10,503
10.3%
R+15.6
D+2.8
R+24.1
19,952
R
32.3%Clinton6,617
50.7%Bush10,379
17.0%
R+18.4
D+22.0
R+23.9
20,479
R
29.5%Dukakis4,299
69.8%Bush10,184
0.7%
R+40.3
D+3.6
R+32.6
14,585
R
27.7%Mondale3,333
71.6%Reagan8,625
0.7%
R+43.9
R+58.8
R+25.7
12,044
D
56.5%Carter7,677
41.6%Reagan5,651
1.9%
D+14.9
R+22.8
D+24.6
13,591
D
68.6%Carter8,447
30.9%Ford3,805
0.5%
D+37.7
D+96.0
D+35.6
12,312
R
19.9%McGovern1,740
78.2%Nixon6,824
1.9%
R+58.2
R+51.7
R+35.1
8,728
O
21.4%Humphrey2,009
27.9%Nixon2,618
50.6%
Wallace +22.7
R+40.9
R+5.8
9,369
D
67.2%Johnson5,560
32.8%Goldwater2,712
0.0%
D+34.4
R+4.9
D+11.8
8,272
D
69.6%Kennedy4,328
30.4%Nixon1,886
0.0%
D+39.3
R+14.9
D+39.1
6,214
D
73.2%Stevenson3,510
19.0%Eisenhower911
7.8%
D+54.2
D+21.1
D+69.6
4,797
D
66.5%Stevenson3,230
33.5%Eisenhower1,624
0.0%
D+33.1
D+6.0
D+43.8
4,854
O
34.0%Truman666
6.9%Dewey135
59.1%
Thurmond +25.0
R+53.6
D+22.7
1,957
D
87.9%Roosevelt1,316
7.1%Dewey106
5.1%
D+80.8
R+2.8
D+73.3
1,498
D
91.8%Roosevelt1,593
8.2%Willkie143
0.0%
D+83.5
R+14.0
D+73.6
1,736
D
97.5%Roosevelt2,057
0.0%Landon0
2.5%
D+97.5
R+1.7
D+73.2
2,110
D
99.2%Roosevelt1,803
0.0%Hoover0
0.8%
D+99.2
D+9.8
D+81.4
1,818
D
94.6%Smith1,263
5.2%Hoover70
0.1%
D+89.4
R+6.4
D+106.8
1,335
D
96.3%Davis989
0.5%Coolidge5
3.2%
D+95.8
D+6.4
D+121.0
1,027
D
94.7%Cox1,249
5.3%Harding70
0.0%
D+89.4
D+2.2
D+115.6
1,319
D
93.5%Wilson885
6.2%Hughes59
0.3%
D+87.2
D+1.5
D+84.1
947
D
85.7%Wilson760
0.0%Taft0
14.3%
D+85.7
D+12.3
D+66.1
887
D
86.6%Bryan1,126
13.2%Taft172
0.2%
D+73.4
R+10.8
D+82.9
1,300
D
92.1%Parker720
7.9%Roosevelt62
0.0%
D+84.1
R+1.2
D+103.8
782
D
92.7%Bryan873
7.3%McKinley69
0.0%
D+85.4
D+10.4
D+92.9
942
D
87.5%Bryan1,392
12.5%McKinley199
0.0%
D+75.0
D+30.7
D+81.1
1,591
D
58.4%Cleveland909
14.1%Harrison220
27.5%
D+44.3
—
D+42.6
1,557
Congressional elections · 2 Senate races
U.S. Senate
Source · MIT Election Lab (MEDSL), Senate. CC-BY 4.0.
Year
Won
Democratic
Republican
Total
2022
R
20.7%5,975
79.3%22,923
28,919
2020
R
26.0%10,576
72.4%29,454
40,697
voter registration
Registered voters
Total registered voters, over time
Registered voters
Voter registration in Seneca, SC
Year
Total registered
2016
50,339
2018
55,810
2020
61,061
2022
59,112
2024
60,883
domestic migration
Who moves in and out
Net domestic migration over time
+1,421 net domestic migration · 2025
20112025
Net +11,412 over 2011–2025 · gain loss
Domestic migration in Seneca, SC in Seneca, SC: net domestic migration by year
Year
Net domestic migration
2011
−99
2012
+279
2013
+392
2014
+276
2015
+573
2016
+656
2017
+885
2018
+998
2019
+1,343
2021
+1,071
2022
+1,251
2023
+1,389
2024
+977
2025
+1,421
Seneca sits at the western tip of South Carolina's Upstate, where textile-era demographics and proximity to Clemson University create an electorate that trends heavily Republican but shows measurable ticket-splitting in local races.
Across the recorded series it reached a Democratic high of 99.2 points in 1932 and a Republican high of 58.2 points in 1972. Between 2020 and 2024 the metro moved 4.1 points toward the Republican candidate; the 2024 margin was 51.5 points.
A population of 80,469, a 83% non-Hispanic-white share, and a median household income of $62,388 describe the metro. The metro's voting pattern over the last decade is most similar to that of Sevierville, TN and Somerset, KY.
Akashic
Political twins — metros
The metros 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.
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 →
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Seneca, SC, South Carolina. Akashic. https://akashic.app/cbsa/42860/. Accessed May 20, 2026. License: CC BY 4.0.
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In 2024, Seneca, SC, South Carolina voted Republican by 51.5 points (R+51.5), carried by the Republican candidate. Out of 42,264 votes cast, 9,987 went Democratic and 31,772 went Republican.
When did Seneca, SC, South Carolina last vote Democratic?
The most recent presidential election in which Seneca, SC, South Carolina voted Democratic was 1980.
How many people live in Seneca, SC, South Carolina?
Seneca, SC, South Carolina has a population of 80,469 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Seneca, SC, South Carolina?
Median household income in Seneca, SC, South Carolina is $62,388 — below the national median of $80,734. The South Carolina state median is $69,324.
What is the political history of Seneca, SC, South Carolina?
Akashic tracks 34 presidential elections in Seneca, SC, South Carolina from 1892 to 2024. Of those, 20 went Democratic and 12 went Republican.
